1
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Lopez LM, Uible MC, Zeller M, Bart SC. Lewis base adducts of NpCl 4. Chem Commun (Camb) 2024; 60:5956-5959. [PMID: 38766982 DOI: 10.1039/d4cc01560f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Np(IV) Lewis base adducts were prepared by ligand substitution of NpCl4(DME)2. Using acetonitrile and pyridine, NpCl4(MeCN)4 (1) and NpCl4(pyr)4 (2) were isolated, respectively. Addition of t-butylbipyridine and triphenylphosphine oxide generated the respective Lewis base adducts, NpCl4(tBuBipy)2 (3) and NpCl4(OPPh3)2 (4). All species were fully characterized using spectroscopic and structural analyses.
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Affiliation(s)
- Lauren M Lopez
- H.C. Brown Laboratory of Chemistry, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
| | - Madeleine C Uible
- H.C. Brown Laboratory of Chemistry, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
| | - Matthias Zeller
- H.C. Brown Laboratory of Chemistry, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
| | - Suzanne C Bart
- H.C. Brown Laboratory of Chemistry, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, IN 47907, USA.
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2
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Otte KS, Niklas JE, Studvick CM, Boggiano AC, Bacsa J, Popov IA, La Pierre HS. Divergent Stabilities of Tetravalent Cerium, Uranium, and Neptunium Imidophosphorane Complexes. Angew Chem Int Ed Engl 2023; 62:e202306580. [PMID: 37327070 DOI: 10.1002/anie.202306580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/18/2023]
Abstract
The study of the redox chemistry of mid-actinides (U-Pu) has historically relied on cerium as a model, due to the accessibility of trivalent and tetravalent oxidation states for these ions. Recently, dramatic shifts of lanthanide 4+/3+ non-aqueous redox couples have been established within a homoleptic imidophosphorane ligand framework. Herein we extend the chemistry of the imidophosphorane ligand (NPC=[N=Pt Bu(pyrr)2 ]- ; pyrr=pyrrolidinyl) to tetrahomoleptic NPC complexes of neptunium and cerium (1-M, 2-M, M=Np, Ce) and present comparative structural, electrochemical, and theoretical studies of these complexes. Large cathodic shifts in the M4+/3+ (M=Ce, U, Np) couples underpin the stabilization of higher metal oxidation states owing to the strongly donating nature of the NPC ligands, providing access to the U5+/4+ , U6+/5+ , and to an unprecedented, well-behaved Np5+/4+ redox couple. The differences in the chemical redox properties of the U vs. Ce and Np complexes are rationalized based on their redox potentials, degree of structural rearrangement upon reduction/oxidation, relative molecular orbital energies, and orbital composition analyses employing density functional theory.
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Affiliation(s)
- Kaitlyn S Otte
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Julie E Niklas
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Chad M Studvick
- Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
| | - Andrew C Boggiano
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - John Bacsa
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Ivan A Popov
- Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
| | - Henry S La Pierre
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
- Nuclear and Radiological Engineering Program, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
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3
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Long BN, Sperling JM, Windorff CJ, Huffman ZK, Albrecht-Schönzart TE. Expanding Transuranium Organoactinide Chemistry: Synthesis and Characterization of (Cp' 3M) 2(μ-4,4'-bpy) (M = Ce, Np, Pu). Inorg Chem 2023; 62:6368-6374. [PMID: 37043631 DOI: 10.1021/acs.inorgchem.3c00217] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Dinuclear, organometallic, transuranium compounds, (Cp'3M)2(μ-4,4'-bpy) (Cp'- = trimethylsilylcyclopentadienide, 4,4'-bpy = 4,4'-bipyridine, M = Ce, Np, Pu), reported herein provide a rare opportunity to probe the nature of actinide-carbon bonding. Significant splitting of the f-f transitions results from the unusual coordination environment in these complexes and leads to electronic properties that are currently restricted to organoactinide systems. Structural and spectroscopic characterization in the solid state and in solution for (Cp'3M)2(μ-4,4'-bpy) (M = Np, Pu) are reported, and their structural metrics are compared to a cerium analogue.
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Affiliation(s)
- Brian N Long
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Cory J Windorff
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C, PO box 30001, Las Cruces, New Mexico 88003, United States
| | - Zachary K Huffman
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Nuclear Science & Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
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4
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Colliard I, Lee JRI, Colla CA, Mason HE, Sawvel AM, Zavarin M, Nyman M, Deblonde GJP. Polyoxometalates as ligands to synthesize, isolate and characterize compounds of rare isotopes on the microgram scale. Nat Chem 2022; 14:1357-1366. [PMID: 36050378 DOI: 10.1038/s41557-022-01018-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 07/04/2022] [Indexed: 01/04/2023]
Abstract
The synthesis and study of radioactive compounds are both inherently limited by their toxicity, cost and isotope scarcity. Traditional methods using small inorganic or organic complexes typically require milligrams of sample-per attempt-which for some isotopes is equivalent to the world's annual supply. Here we demonstrate that polyoxometalates (POMs) enable the facile formation, crystallization, handling and detailed characterization of metal-ligand complexes from microgram quantities owing to their high molecular weight and controllable solubility properties. Three curium-POM complexes were prepared, using just 1-10 μg per synthesis of the rare isotope 248Cm3+, and characterized by single-crystal X-ray diffraction, showing an eight-coordinated Cm3+ centre. Moreover, spectrophotometric, fluorescence, NMR and Raman analyses of several f-block element-POM complexes, including 243Am3+ and 248Cm3+, showed otherwise unnoticeable differences between their solution versus solid-state chemistry, and actinide versus lanthanide behaviour. This POM-driven strategy represents a viable path to isolate even rarer complexes, notably with actinium or transcalifornium elements.
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Affiliation(s)
- Ian Colliard
- Glenn T. Seaborg Institute, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA
- Department of Chemistry, Oregon State University, Corvallis, OR, USA
| | - Jonathan R I Lee
- Material Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Christopher A Colla
- Atmospheric, Earth and Energy Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Harris E Mason
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - April M Sawvel
- Material Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - Mavrik Zavarin
- Glenn T. Seaborg Institute, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, OR, USA
| | - Gauthier J-P Deblonde
- Glenn T. Seaborg Institute, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, USA.
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, USA.
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5
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Motta LC, Autschbach J. Theoretical Evaluation of Metal-Ligand Bonding in Neptunium Compounds in Relation to 237Np Mössbauer Spectroscopy. Inorg Chem 2022; 61:13399-13412. [PMID: 35960509 DOI: 10.1021/acs.inorgchem.2c01516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The 237Np Mössbauer isomer shift and quadrupole splitting (QS) are powerful probes for the metal-ligand bonding of neptunium, a 5f-element of vital importance in the nuclear fuel cycle. A large set of Np compounds with different oxidation states (III) to (VII) is studied to investigate, by first-principles calculations, isomer shifts and the QS trends in relation to the Np oxidation state. Natural Bond Orbital analysis reveals that in addition to donation bonding to the 5f shell, participation of the 6d and 7s neptunium shells in covalent (donation) bonding substantially impacts the isomer shifts. The isomer shift cannot be interpreted solely by the 5f shell electron count. The isomer shift for Np(II) compounds is estimated to be in the range of 31-34 mm/s, less positive than for Np(III) compounds. For the QS, density functional calculations fail to reproduce the quadrupole splitting for some Np(VI) ionic solids. A multiconfigurational wave function approach reproduces the observed QS trends. The calculations give a semiquantitative interpretation of the trends for Np oxidation states (V) to (VII). The contrasting QS for standard and "reverse" neptunyl(VI), at the opposite extremes of the observed QS scale, arises predominantly from the different crystal environments.
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Affiliation(s)
- Laura C Motta
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
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6
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Kovács A, Apostolidis C, Walter O. Competing Metal-Ligand Interactions in Tris(cyclopentadienyl)-cyclohexylisonitrile Complexes of Trivalent Actinides and Lanthanides. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27123811. [PMID: 35744936 PMCID: PMC9228681 DOI: 10.3390/molecules27123811] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 12/01/2022]
Abstract
The structure and bonding properties of 16 complexes formed by trivalent f elements (M=U, Np, Pu and lanthanides except for Pm and Pr) with cyclopentadienyl (Cp) and cyclohexylisonitrile (C≡NCy) ligands, (Cp)3M(C≡NCy), were studied by a joint experimental (XRD, NMR) and theoretical (DFT) analysis. For the large La(III) ion, the bis-adduct (Cp)3La(C≡NCy)2 could also be synthesized and characterized. The metal–ligand interactions, focusing on the comparison of the actinides and lanthanides as well as on the competition of the two different ligands for M, were elucidated using the Quantum Theory of Atoms in Molecules (QTAIM) and Natural Bond Orbital (NBO) models. The results point to interactions of comparable strengths with the anionic Cp and neutral C≡NCy ligands in the complexes. The structural and bonding properties of the actinide complexes reflect small but characteristic differences with respect to the lanthanide analogues. They include larger ligand-to-metal charge transfers as well as metal–ligand electron-sharing interactions. The most significant experimental marker of these covalent interactions is the C≡N stretching frequency.
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7
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Goodwin CAP, Wooles AJ, Murillo J, Lu E, Boronski JT, Scott BL, Gaunt AJ, Liddle ST. Carbene Complexes of Neptunium. J Am Chem Soc 2022; 144:9764-9774. [PMID: 35609882 PMCID: PMC9490846 DOI: 10.1021/jacs.2c02152] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Since the advent
of organotransuranium chemistry six decades ago,
structurally verified complexes remain restricted to π-bonded
carbocycle and σ-bonded hydrocarbyl derivatives. Thus, transuranium-carbon
multiple or dative bonds are yet to be reported. Here, utilizing diphosphoniomethanide
precursors we report the synthesis and characterization of transuranium-carbene
derivatives, namely, diphosphonio-alkylidene- and N-heterocyclic carbene–neptunium(III) complexes that exhibit
polarized-covalent σ2π2 multiple
and dative σ2 single transuranium-carbon bond interactions,
respectively. The reaction of [NpIIII3(THF)4] with [Rb(BIPMTMSH)] (BIPMTMSH = {HC(PPh2NSiMe3)2}1–) affords
[(BIPMTMSH)NpIII(I)2(THF)] (3Np) in situ, and subsequent treatment with the N-heterocyclic carbene {C(NMeCMe)2} (IMe4) allows
isolation of [(BIPMTMSH)NpIII(I)2(IMe4)] (4Np). Separate treatment of in situ
prepared 3Np with benzyl potassium in 1,2-dimethoxyethane
(DME) affords [(BIPMTMS)NpIII(I)(DME)] (5Np, BIPMTMS = {C(PPh2NSiMe3)2}2–). Analogously, addition of benzyl
potassium and IMe4 to 4Np gives [(BIPMTMS)NpIII(I)(IMe4)2] (6Np). The synthesis of 3Np–6Np was facilitated by adopting a scaled-down prechoreographed approach
using cerium synthetic surrogates. The thorium(III) and uranium(III)
analogues of these neptunium(III) complexes are currently unavailable,
meaning that the synthesis of 4Np–6Np provides an example of experimental grounding of 5f- vs 5f- and
5f- vs 4f-element bonding and reactivity comparisons being led by
nonaqueous transuranium chemistry rather than thorium and uranium
congeners. Computational analysis suggests that these NpIII=C bonds are more covalent than UIII=C,
CeIII=C, and PmIII=C congeners
but comparable to analogous UIV=C bonds in terms
of bond orders and total metal contributions to the M=C bonds.
A preliminary assessment of NpIII=C reactivity has
introduced multiple bond metathesis to transuranium chemistry, extending
the range of known metallo-Wittig reactions to encompass actinide
oxidation states III-VI.
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Affiliation(s)
- Conrad A P Goodwin
- Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ashley J Wooles
- Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Jesse Murillo
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Erli Lu
- Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Josef T Boronski
- Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Brian L Scott
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Stephen T Liddle
- Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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8
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Li S, Ye X, Feng C, Wang Y, Gao T, Ao B, Li D, Zhang G. Pressure-induced evolution of crystal and electronic structure of neptunium hydrides. Phys Chem Chem Phys 2022; 24:4916-4924. [PMID: 35137738 DOI: 10.1039/d1cp05467h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An extensive exploration of high-pressure phase diagrams of NpHx (x = 1-10) compounds was performed by using swarm-intelligence-based CALYPSO structure searches. We propose five stable hydrogen-rich clathrate phases (P4/nmm-NpH5, Cmcm-NpH7, Fm3̄m-NpH8, P63/mmc-NpH9, and Fm3̄m-NpH10) that are composed of unusual H cages with stoichiometries H20, H24, H29, and H32 in which the H atoms are weakly covalently bonded to one another, with neptunium atoms occupying centers of the cages. The electronic structure analyses show that these predicted hydrogen-rich structures are all metallic phases, and Np-H and H-H bonds are formed by ionic and covalent bond interactions, respectively. The charge transfer from the Np atom plays an important role in the stability of the proposed structures. All hydrogen-rich clathrate structures show superconductivity behavior in their respective stability pressure range. Our work is an important step in understanding the phase stability and bonding behavior of NpHx under extreme conditions and provides a valuable reference for experimental synthesis and identification of cage-like neptunium hydrides.
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Affiliation(s)
- Shichang Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Xiaoqiu Ye
- Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908, China
| | - Chunbao Feng
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Yilin Wang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China.
| | - Tao Gao
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, 610065, China
| | - Bingyun Ao
- Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908, China
| | - Dengfeng Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China. .,Institute for Advanced Sciences, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China
| | - Gang Zhang
- Institute of High Performance Computing, A*STAR, 138632, Singapore.
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9
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Abstract
Neptunium was the first actinide element to be artificially synthesized, yet, compared with its more famous neighbours uranium and plutonium, is less conspicuously studied. Most neptunium chemistry involves the neptunyl di(oxo)-motif, and transuranic compounds with one metal-ligand multiple bond are rare, being found only in extended-structure oxide, fluoride or oxyhalide materials. These combinations stabilize the required high oxidation states, which are otherwise challenging to realize for transuranic ions. Here we report the synthesis, isolation and characterization of a stable molecular neptunium(V)-mono(oxo) triamidoamine complex. We describe a strong Np≡O triple bond with dominant 5f-orbital contributions and σu > πu energy ordering, akin to terminal uranium-nitrides and di(oxo)-actinyls, but not the uranium-mono(oxo) triple bonds or other actinide multiple bonds reported so far. This work demonstrates that molecular high-oxidation-state transuranic complexes with a single metal-ligand bond can be stabilized and studied in isolation.
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10
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Whitefoot MA, Perales D, Zeller M, Bart SC. Synthesis of Non-Aqueous Neptunium(III) Halide Solvates from NpO 2. Chemistry 2021; 27:18054-18057. [PMID: 34643978 DOI: 10.1002/chem.202103265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Indexed: 11/08/2022]
Abstract
Two Np(III) halides, NpI3 (THF)4 and NpBr3 (THF)4 , have been prepared and isolated in high yields as described in this work. Starting with neptunia (NpO2 ), NpCl4 (DME)2 was first generated in an updated, higher yielding synthesis than what was previously reported by using HCl/HF. This material was then reduced with KC8 , followed by subsequent ligand exchange, to generate NpBr3 (THF)4 and NpI3 -(THF)4 . Full characterization by single-crystal X-ray crystallography, 1 H NMR spectroscopy and electronic absorption spectroscopy confirmed the molecular formulas and oxidation states. These trivalent materials are straightforward to synthesize and can be used as starting materials for non-aqueous Np(III) chemistry, obviating the need for rare and restricted Np metal and elemental halogens.
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Affiliation(s)
- Megan A Whitefoot
- Department of Chemistry, Purdue University, H. C. Brown Laboratory, 560 Oval Dr, West Lafayette, Indiana, 47907, USA
| | - Diana Perales
- Department of Chemistry, Purdue University, H. C. Brown Laboratory, 560 Oval Dr, West Lafayette, Indiana, 47907, USA
| | - Matthias Zeller
- Department of Chemistry, Purdue University, H. C. Brown Laboratory, 560 Oval Dr, West Lafayette, Indiana, 47907, USA
| | - Suzanne C Bart
- Department of Chemistry, Purdue University, H. C. Brown Laboratory, 560 Oval Dr, West Lafayette, Indiana, 47907, USA
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11
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Goodwin CAP, Ciccone SR, Bekoe S, Majumdar S, Scott BL, Ziller JW, Gaunt AJ, Furche F, Evans WJ. 2.2.2-Cryptand complexes of neptunium(III) and plutonium(III). Chem Commun (Camb) 2021; 58:997-1000. [PMID: 34937074 DOI: 10.1039/d1cc05904a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
New coordination environments are reported for Np(III) and Pu(III) based on pilot studies of U(III) in 2.2.2-cryptand (crypt). The U(III)-in-crypt complex, [U(crypt)I2][I], obtained from the reaction between UI3 and crypt, is treated with Me3SiOTf (OTf = O3SCF3) in benzene to form the [U(crypt)(OTf)2][OTf] complex. Similarly, the isomorphous Np(III) and Pu(III) complexes were obtained similarly starting from [AnI3(THF)4]. All three complexes (1-An; An = U, Np, Pu) contain an encapsulated actinide in a THF-soluble complex. Absorption spectroscopy and DFT calculations are consistent with 5f3 U(III), 5f4 Np(III), and 5f5 Pu(III) electron configurations.
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Affiliation(s)
- Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Sierra R Ciccone
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
| | - Samuel Bekoe
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
| | - Sourav Majumdar
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
| | - Brian L Scott
- Materials Physics & Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| | - Joseph W Ziller
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Filipp Furche
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
| | - William J Evans
- Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025, USA.
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12
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Staun SL, Wu G, Lukens WW, Hayton TW. Synthesis of a heterobimetallic actinide nitride and an analysis of its bonding. Chem Sci 2021; 12:15519-15527. [PMID: 35003580 PMCID: PMC8653994 DOI: 10.1039/d1sc05072a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/13/2021] [Indexed: 11/21/2022] Open
Abstract
Reaction of [K(DME)][Th{N(R)(SiMe2 CH2)}2(NR2)] (R = SiMe3) with 1 equiv. of [U(NR2)3(NH2)] (1) in THF, in the presence of 18-crown-6, results in formation of a bridged uranium-thorium nitride complex, [K(18-crown-6)(THF)2][(NR2)3UIV(μ-N)ThIV(NR2)3] (2), which can be isolated in 48% yield after work-up. Complex 2 is the first isolable molecular mixed-actinide nitride complex. Also formed in the reaction is the methylene-bridged mixed-actinide nitride, [K(18-crown-6)][K(18-crown-6)(Et2O)2][(NR2)2U(μ-N)(μ-κ2-C,N-CH2SiMe2NR)Th(NR2)2]2 (3), which can be isolated in 34% yield after work-up. Complex 3 is likely generated by deprotonation of a methyl group in 2 by [NR2]-, yielding the new μ-CH2 moiety and HNR2. Reaction of 2 with 0.5 equiv. of I2 results in formation of a UV/ThIV bridged nitride, [(NR2)3UV(μ-N)ThIV(NR2)3] (4), which can be isolated in 42% yield after work-up. The electronic structure of 4 was analyzed with EPR spectroscopy, SQUID magnetometry, and NIR-visible spectroscopy. This analysis demonstrated that the energies of 5f orbitals of 4 are largely determined by the strong ligand field exerted by the nitride ligand.
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Affiliation(s)
- Selena L Staun
- Department of Chemistry and Biochemistry, University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara Santa Barbara California 93106 USA
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley California 94720 USA
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California, Santa Barbara Santa Barbara California 93106 USA
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13
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Su J, Cheisson T, McSkimming A, Goodwin CAP, DiMucci IM, Albrecht-Schönzart T, Scott BL, Batista ER, Gaunt AJ, Kozimor SA, Yang P, Schelter EJ. Complexation and redox chemistry of neptunium, plutonium and americium with a hydroxylaminato ligand. Chem Sci 2021; 12:13343-13359. [PMID: 34777753 PMCID: PMC8528073 DOI: 10.1039/d1sc03905a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/03/2021] [Indexed: 11/25/2022] Open
Abstract
There is significant interest in ligands that can stabilize actinide ions in oxidation states that can be exploited to chemically differentiate 5f and 4f elements. Applications range from developing large-scale actinide separation strategies for nuclear industry processing to carrying out analytical studies that support environmental monitoring and remediation efforts. Here, we report syntheses and characterization of Np(iv), Pu(iv) and Am(iii) complexes with N-tert-butyl-N-(pyridin-2-yl)hydroxylaminato, [2-(tBuNO)py]−(interchangeable hereafter with [(tBuNO)py]−), a ligand which was previously found to impart remarkable stability to cerium in the +4 oxidation state. An[(tBuNO)py]4 (An = Pu, 1; Np, 2) have been synthesized, characterized by X-ray diffraction, X-ray absorption, 1H NMR and UV-vis-NIR spectroscopies, and cyclic voltammetry, along with computational modeling and analysis. In the case of Pu, oxidation of Pu(iii) to Pu(iv) was observed upon complexation with the [(tBuNO)py]− ligand. The Pu complex 1 and Np complex 2 were also isolated directly from Pu(iv) and Np(iv) precursors. Electrochemical measurements indicate that a Pu(iii) species can be accessed upon one-electron reduction of 1 with a large negative reduction potential (E1/2 = −2.26 V vs. Fc+/0). Applying oxidation potentials to 1 and 2 resulted in ligand-centered electron transfer reactions, which is different from the previously reported redox chemistry of UIV[(tBuNO)py]4 that revealed a stable U(v) product. Treatment of an anhydrous Am(iii) precursor with the [(tBuNO)py]− ligand did not result in oxidation to Am(iv). Instead, the dimeric complex [AmIII(μ2-(tBuNO)py)((tBuNO)py)2]2 (3) was isolated. Complex 3 is a rare example of a structurally characterized non-aqueous Am-containing molecular complex prepared using inert atmosphere techniques. Predicted redox potentials from density functional theory calculations show a trivalent accessibility trend of U(iii) < Np(iii) < Pu(iii) and that the higher oxidation states of actinides (i.e., +5 for Np and Pu and +4 for Am) are not stabilized by [2-(tBuNO)py]−, in good agreement with experimental observations. The coordination modes and electronic properties of a strongly coordinating hydroxylaminato ligand with Np, Pu and Am were investigated.Complexes were characterized by a range of experimental and computational techniques.![]()
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Affiliation(s)
- Jing Su
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thibault Cheisson
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Alex McSkimming
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ida M DiMucci
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Thomas Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University 95 Chieftan Way Tallahassee Florida 32306 USA
| | - Brian L Scott
- Materials and Physics Applications Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory Los Alamos New Mexico 87545 USA
| | - Eric J Schelter
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania 231 S 34th St. Philadelphia Pennsylvania 19104 USA
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14
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Motta LC, Autschbach J. Theoretical Prediction and Interpretation of 237Np Mössbauer Isomer Shifts. J Chem Theory Comput 2021; 17:6166-6179. [PMID: 34550695 DOI: 10.1021/acs.jctc.1c00687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Different theoretical approaches for the calculation of 237Np Mössbauer isomer shifts are investigated. The traditional contact density route is compared to a previously proposed alternative approach that uses energy derivatives with respect to the nuclear radius. Both approaches yield similar results as long as suitable basis sets augmented with large exponents and relativistic methods are used. Density functional theory (DFT) calculations do not show a strong dependency of the 237Np isomer shift on the chosen functional. Wavefunction calculations show that dynamic electron correlation can be important when covalent bonding influences the isomer shift. Effects from spin-orbit coupling are small. The isomer shifts of ionic solids and Np(III) organometallic complexes are largely governed by the oxidation state of Np. Isomer shifts of organometallic Np(IV) complexes are strongly affected by donation bonding. Detailed analysis of the wavefunction results with different active spaces demonstrates that correlation among the outer core Np and occupied ligand frontier orbitals contributes significantly to isomer shifts of Np(IV) compounds.
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Affiliation(s)
- Laura C Motta
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000, United States
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15
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Xu ZF, Zhang WJ, Zhang P, Hu SX. Unprecedented neptunyl(V) cation-directed structural variations in Np 2O x compounds. NANOSCALE 2021; 13:15590-15597. [PMID: 34528990 DOI: 10.1039/d1nr03408a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Studies on transuranic oxides provide a particularly valuable insight into chemical bonding in actinide compounds, in which subtle differences between metal ions and oxygen atoms are of fundamental importance for the stability of these compounds as well as their existence. In the case of neptunium, it is still mainly limited to specific Np oxide compounds without periodicity in the formation of stable structures or different oxidation states. Here, we report a systematic global minimum search of Np2Ox (x = 1-7) clusters and the computational study of their electronic structures and chemical bonding. These studies suggest that Np(V) ion could play the structure-directing role, and thus the mixed-valent Np(III/V) in Np2O4 is predicted accessible. In comparison with lower oxidation state Np analogues, significant 5f-orbital covalent interactions with Np(V)O bonding are observed, which shows that these model neptunium oxides can provide new understandings into the behavior of 5f-electrons in chemical bonding and structural design.
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Affiliation(s)
- Zhong-Fei Xu
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China.
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Wen-Jing Zhang
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China.
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Ping Zhang
- Beijing Computational Science Research Center, Beijing, 100193, China
| | - Shu-Xian Hu
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China.
- Beijing Computational Science Research Center, Beijing, 100193, China
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16
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Gilson SE, Burns PC. The crystal and coordination chemistry of neptunium in all its oxidation states: An expanded structural hierarchy of neptunium compounds. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213994] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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17
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Oh S, Seo J, Choi G, Lee HS. Understanding adsorption geometry of organometallic molecules on graphite. Sci Rep 2021; 11:18497. [PMID: 34531487 PMCID: PMC8446079 DOI: 10.1038/s41598-021-97978-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 08/26/2021] [Indexed: 11/18/2022] Open
Abstract
To comprehensively investigate the adsorption geometries of organometallic molecules on graphene, Cp*Ru+ fragments as an organometallic molecule is bound on highly oriented pyrolytic graphite and imaged at atomic resolution using scanning tunneling microscopy (STM) (Cp* = pentamethylcyclopentadienyl). Atomic resolution imaging through STM shows that the Cp*Ru+ fragments are localized above the hollow position of the hexagonal structure, and that the first graphene layer adsorbed with the fragments on the graphite redeveloped morphologically to minimize its geometric energy. For a better understanding of the adsorption site and molecular geometry, experimental results are compared with computed calculations for the graphene surface with Cp*Ru+ fragments. These calculations show the adsorption geometries of the fragment on the graphene surface and the relationship between the geometric energy and molecular configuration. Our results provide the chemical anchoring geometry of molecules on the graphene surface, thereby imparting the theoretical background necessary for controlling the various properties of graphene in the future.
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Affiliation(s)
- Seungtaek Oh
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea.,BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Jungyoon Seo
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea.,BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Giheon Choi
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea.,BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea
| | - Hwa Sung Lee
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea. .,BK21 FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi, 15588, Republic of Korea.
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18
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Celis-Barros C, Albrecht-Schönzart T, Windorff CJ. Computational Investigation of the Bonding in [(η 5–Cp′) 3(η 1–Cp′)M] 1– (M = Pu, U, Ce). Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Cristian Celis-Barros
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, RM. 118 DLC, Tallahassee, Florida 32306, United States
| | - Thomas Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, RM. 118 DLC, Tallahassee, Florida 32306, United States
| | - Cory J. Windorff
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, RM. 118 DLC, Tallahassee, Florida 32306, United States
- Department of Chemistry and Biochemistry, New Mexico State University, MSC 3C, PO Box 3001, Las Cruces, New Mexico 88003, United States
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19
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Pace KA, Klepov VV, Berseneva AA, Zur Loye HC. Covalency in Actinide Compounds. Chemistry 2021; 27:5835-5841. [PMID: 33283323 DOI: 10.1002/chem.202004632] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/29/2020] [Indexed: 11/10/2022]
Abstract
Covalency in actinides has emerged as a resounding research topic on account of the technological importance in separating minor actinides from lanthanides for spent nuclear fuel processing, and utilization of their distinct bonding properties has been realized as a route towards overcoming this challenge. Because of the limited radial extent of the 4f orbitals, there is almost no 4f electron participation in bonding in lanthanides; this is not the case for the actinides, which have extended 5f orbitals that are capable of overlapping with ligand orbitals, although not to the degree of overlap as in the d orbitals of transition metals. In this concept paper, a general description of covalency in actinide compounds is provided. After introducing two main approaches to enhance covalency, either by exploiting increased orbital overlap or decreasing energy differences between the orbitals causing orbital energy degeneracy, the current state of the field is illustrated by using several examples from the recent literature. This paper is concluded by proposing the use of actinide chalcogenides as a convenient auxiliary tool to study covalency in actinide compounds.
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Affiliation(s)
- Kristen A Pace
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA
| | - Vladislav V Klepov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA
| | - Anna A Berseneva
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA
| | - Hans-Conrad Zur Loye
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC, 29208, USA
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20
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Staun SL, Stevens LM, Smiles DE, Goodwin CAP, Billow BS, Scott BL, Wu G, Tondreau AM, Gaunt AJ, Hayton TW. Expanding the Nonaqueous Chemistry of Neptunium: Synthesis and Structural Characterization of [Np(NR 2) 3Cl], [Np(NR 2) 3Cl] -, and [Np{ N(R)(SiMe 2CH 2)} 2(NR 2)] - (R = SiMe 3). Inorg Chem 2021; 60:2740-2748. [PMID: 33539075 DOI: 10.1021/acs.inorgchem.0c03616] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Reaction of 3 equiv of NaNR2 (R = SiMe3) with NpCl4(DME)2 in THF afforded the Np(IV) silylamide complex, [Np(NR2)3Cl] (1), in good yield. Reaction of 1 with 1.5 equiv of KC8 in THF, in the presence of 1 equiv of dibenzo-18-crown-6, resulted in formation of [{K(DB-18-C-6)(THF)}3(μ3-Cl)][Np(NR2)3Cl]2 (4), also in good yield. Complex 4 represents the first structurally characterized Np(III) amide. Finally, reaction of NpCl4(DME)2 with 5 equiv of NaNR2 and 1 equiv of dibenzo-18-crown-6 afforded the Np(IV) bis(metallacycle), [{Na(DB-18-C-6)(Et2O)0.62(κ1-DME)0.38}2(μ-DME)][Np{N(R)(SiMe2CH2)}2(NR2)]2 (8), in moderate yield. Complex 8 was characterized by 1H NMR spectroscopy and X-ray crystallography and represents a rare example of a structurally characterized neptunium-hydrocarbyl complex. To support these studies, we also synthesized the uranium analogues of 4 and 8, namely, [K(2,2,2-cryptand)][U(NR2)3Cl] (2), [K(DB-18-C-6)(THF)2][U(NR2)3Cl] (3), [Na(DME)3][U{N(R)(SiMe2CH2)}2(NR2)] (6), and [{Na(DB-18-C-6)(Et2O)0.5(κ1-DME)0.5}2(μ-DME)][U{N(R)(SiMe2CH2)}2(NR2)]2 (7). Complexes 2, 3, 6, and 7 were characterized by a number of techniques, including NMR spectroscopy and X-ray crystallography.
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Affiliation(s)
- Selena L Staun
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States.,Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Lauren M Stevens
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Danil E Smiles
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States.,Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brennan S Billow
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L Scott
- Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Aaron M Tondreau
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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21
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Probing electronic structure in berkelium and californium via an electron microscopy nanosampling approach. Nat Commun 2021; 12:948. [PMID: 33574255 PMCID: PMC7878762 DOI: 10.1038/s41467-021-21189-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/18/2021] [Indexed: 11/08/2022] Open
Abstract
Due to their rarity and radioactive nature, comparatively little is known about the actinides, particularly those with atomic numbers higher than that of plutonium, and their compounds. In this work, we describe how transmission electron microscopy can provide comprehensive, safe, and cost-effective characterization using only single nanogram amounts of highly-radioactive, solid compounds. Chlorides of the rare elements berkelium and californium are dropcast and then converted in situ to oxides using the electron beam. The f-band occupancies are probed using electron energy loss spectroscopy and an unexpectedly weak spin-orbit-coupling is identified for berkelium. In contrast, californium follows a jj coupling scheme. These results have important implications for the chemistries of these elements and solidify the status of californium as a transitional element in the actinide series. The obtention and study of actinide elements is challenging due to various factors including their radioactivity and scarcity. Herein, the authors characterize the atomic and electronic structure of Am, Cm, Bk, and Cf compounds using a transmission electron microscopy-based workflow that only requires nanogram amounts of the actinide element.
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22
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Windorff CJ, Sperling JM, Albrecht-Schönzart TE, Bai Z, Evans WJ, Gaiser AN, Gaunt AJ, Goodwin CAP, Hobart DE, Huffman ZK, Huh DN, Klamm BE, Poe TN, Warzecha E. A Single Small-Scale Plutonium Redox Reaction System Yields Three Crystallographically-Characterizable Organoplutonium Complexes. Inorg Chem 2020; 59:13301-13314. [PMID: 32910649 DOI: 10.1021/acs.inorgchem.0c01671] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An approach to obtaining substantial amounts of data from a hazardous starting material that can only be obtained and handled in small quantities is demonstrated by the investigation of a single small-scale reaction of cyclooctatetraene, C8H8, with a solution obtained from the reduction of Cp'3Pu (Cp' = C5H4SiMe3) with potassium graphite. This one reaction coupled with oxidation of a product has provided single-crystal X-ray structural data on three organoplutonium compounds as well as information on redox chemistry thereby demonstrating an efficient route to new reactivity and structural information on this highly radioactive element. The crystal structures were obtained from the reduction of C8H8 by a putative Pu(II) complex, (Cp'3PuII)1-, generated in situ, to form the Pu(III) cyclooctatetraenide complex, [K(crypt)][(C8H8)2PuIII], 1-Pu, and the tetra(cyclopentadienyl) Pu(III) complex, [K(crypt)][Cp'4PuIII], 2-Pu. Oxidation of the sample of 1-Pu with Ag(I) afforded a third organoplutonium complex that has been structurally characterized for the first time, (C8H8)2PuIV, 3-Pu. Complexes 1-Pu and 3-Pu contain Pu sandwiched between parallel (C8H8)2- rings. The (Cp'4PuIII)- anion in 2-Pu features three η5-Cp' rings and one η1-Cp' ring, which is a rare example of a formal Pu-C η1-bond. In addition, this study addresses the challenge of small-scale synthesis imparted by radiological and material availability of transuranium isotopes, in particular that of pure metal samples. A route to an anhydrous Pu(III) starting material from the more readily available PuIVO2 was developed to facilitate reproducible syntheses and allow complete spectroscopic analysis of 1-Pu and 2-Pu. PuIVO2 was converted to PuIIIBr3(DME)2 (DME = CH3OCH2CH2OCH3) and subsequently PuIIIBr3(THF)x, which was used to independently synthesize 1-Pu, 2-Pu, and 3-Pu.
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Affiliation(s)
- Cory J Windorff
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.,Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States.,Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Zhuanling Bai
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - William J Evans
- Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States
| | - Alyssa N Gaiser
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - David E Hobart
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Zachary K Huffman
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Daniel N Huh
- Department of Chemistry, University of California-Irvine, Irvine, California 92697, United States
| | - Bonnie E Klamm
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Todd N Poe
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Evan Warzecha
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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23
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Apostolidis C, Kovács A, Walter O, Colineau E, Griveau J, Morgenstern A, Rebizant J, Caciuffo R, Panak PJ, Rabung T, Schimmelpfennig B, Perfetti M. Tris-{hydridotris(1-pyrazolyl)borato}actinide Complexes: Synthesis, Spectroscopy, Crystal Structure, Bonding Properties and Magnetic Behaviour. Chemistry 2020; 26:11293-11306. [PMID: 32519790 PMCID: PMC7497007 DOI: 10.1002/chem.202001095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/26/2020] [Indexed: 01/10/2023]
Abstract
The isostructural compounds of the trivalent actinides uranium, neptunium, plutonium, americium, and curium with the hydridotris(1-pyrazolyl)borato (Tp) ligand An[η3 -HB(N2 C3 H3 )3 ]3 (AnTp3 ) have been obtained through several synthetic routes. Structural, spectroscopic (absorption, infrared, laser fluorescence) and magnetic characterisation of the compounds were performed in combination with crystal field, density functional theory (DFT) and relativistic multiconfigurational calculations. The covalent bonding interactions were analysed in terms of the natural bond orbital (NBO) and quantum theory of atoms in molecules (QTAIM) models.
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Affiliation(s)
| | - Attila Kovács
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | - Olaf Walter
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | - Eric Colineau
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | | | - Alfred Morgenstern
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | - Jean Rebizant
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | - Roberto Caciuffo
- European Commission, Joint Research CentrePostfach 234076125KarlsruheGermany
| | - Petra J. Panak
- Institut für Nukleare EntsorgungForschungszentrum KarlsruhePostfach 364076021KarlsruheGermany
| | - Thomas Rabung
- Institut für Nukleare EntsorgungForschungszentrum KarlsruhePostfach 364076021KarlsruheGermany
| | - Bernd Schimmelpfennig
- Institut für Nukleare EntsorgungForschungszentrum KarlsruhePostfach 364076021KarlsruheGermany
| | - Mauro Perfetti
- Department of ChemistryUniversity of CopenhagenUniversitetsparken 52100CopenhagenDenmark
- Department of Chemistry “Ugo Schiff” and INSTM Research UnitUniversity of FlorenceVia della Lastruccia 350019Sesto FiorentinoItaly
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24
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Ein neutrales 1,4‐Diborabenzol als π‐Ligand in Actinoidkomplexen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Peter Hrobárik
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
- Department of Inorganic Chemistry Faculty of Natural Sciences Comenius University 84215 Bratislava Slowakei
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Martin S. Luff
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Thomas Kupfer
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Martin Kaupp
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Holger Braunschweig
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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25
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Stable Actinide π Complexes of a Neutral 1,4-Diborabenzene. Angew Chem Int Ed Engl 2020; 59:13109-13115. [PMID: 32329111 PMCID: PMC7496575 DOI: 10.1002/anie.202004501] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Indexed: 11/25/2022]
Abstract
The π coordination of arene and anionic heteroarene ligands is a ubiquitous bonding motif in the organometallic chemistry of d-block and f-block elements. By contrast, related π interactions of neutral heteroarenes including neutral bora-π-aromatics are less prevalent particularly for the f-block, due to less effective metal-to-ligand backbonding. In fact, π complexes with neutral heteroarene ligands are essentially unknown for the actinides. We have now overcome these limitations by exploiting the exceptionally strong π donor capabilities of a neutral 1,4-diborabenzene. A series of remarkably robust, π-coordinated thorium(IV) and uranium(IV) half-sandwich complexes were synthesized by simply combining the bora-π-aromatic with ThCl4 (dme)2 or UCl4 , representing the first examples of actinide complexes with a neutral boracycle as sandwich-type ligand. Experimental and computational studies showed that the strong actinide-heteroarene interactions are predominately electrostatic in nature with distinct ligand-to-metal π donation and without significant π/δ backbonding contributions.
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Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Peter Hrobárik
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University84215BratislavaSlovakia
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Martin S. Luff
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Thomas Kupfer
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Kaupp
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Holger Braunschweig
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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26
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Affiliation(s)
- Josef T. Boronski
- Department of Chemistry; The University of Manchester; Oxford Road M13 9PL Manchester UK
| | - Stephen T. Liddle
- Department of Chemistry; The University of Manchester; Oxford Road M13 9PL Manchester UK
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27
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Makoś MZ, Zou W, Freindorf M, Kraka E. Metal–ring interactions in actinide sandwich compounds: A combined normalized elimination of the small component and local vibrational mode study. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1768314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Małgorzata Z. Makoś
- Computational and Theoretical Chemistry Group (CATCO), Southern Methodist University, Dallas, TX, USA
| | - Wenli Zou
- Institute of Modern Physics, Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an, Shaanxi, People's Republic of China
| | - Marek Freindorf
- Computational and Theoretical Chemistry Group (CATCO), Southern Methodist University, Dallas, TX, USA
| | - Elfi Kraka
- Computational and Theoretical Chemistry Group (CATCO), Southern Methodist University, Dallas, TX, USA
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28
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Adeyiga O, Panthi D, Suleiman O, Stetler D, Long RW, Odoh SO. Activating Water and Hydrogen by Ligand-Modified Uranium and Neptunium Complexes: A Density Functional Theory Study. Inorg Chem 2020; 59:3102-3109. [PMID: 32049500 DOI: 10.1021/acs.inorgchem.9b03433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Organometallic uranium complexes that can activate small molecules are well-known. In contrast, there are no known organometallic trans-uranium species capable of small-molecule transformations. Using density functional theory, we previously showed that changing actinide-ligand bonds from U-O groups to Np-N- (amide/imido) bonds makes redox small-molecule activation more energetically favorable for Np species. Here, we determine how general this ligand-modulation strategy is for affecting small-molecule activation in Np species. We focus on two reactions, one involving redox transformation of the actinide(s) and the other involving no change in the oxidation state of the actinide(s). Specifically, we considered the hydrogen evolution reaction (HER) from H2O by actinide tris-aryloxide species. We also considered H2 capture and hydride transfer by actinide siloxide and silylamide complexes. For the HER, the barriers for Np(III) systems are much higher than those of U(III). The overall reaction energies are also much worse. An-O → An-N substitutions marginally improve the barriers by 1-4 kcal/mol and more substantially improve the reaction energies by 9-15 kcal/mol. For H2 capture and hydride transfer, the reaction energies for the U and Np species are similar. For both actinides, like-for-like An-O → An-N substitutions lead to improved reaction energies. Interestingly, in a recent report, it seemingly appears that U-O (siloxide) → U-N (silylamide) leads to complete shutdown of reactivity for H2 capture and hydride transfer. This observation is reproduced and explained with calculations. The ligand environments of the siloxide and silylamide that were compared are vastly different. The steric environment of the siloxide is conducive for reactivity while the particular silylamide is not. We conclude that small-molecule activation with organometallic neptunium species is achievable with a guided choice of ligands. Additional emphasis should be placed on ligands that can allow for improved transition state barriers.
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Affiliation(s)
- Olajumoke Adeyiga
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Dipak Panthi
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Olabisi Suleiman
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Dillon Stetler
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Ryan W Long
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
| | - Samuel O Odoh
- Department of Chemistry, University of Nevada Reno, 1664 North Virginia Street, Reno, Nevada 89557-0216, United States
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29
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Zhu H, Gao C, Filatov M, Zou W. Mössbauer isomer shifts and effective contact densities obtained by the exact two-component (X2C) relativistic method and its local variants. Phys Chem Chem Phys 2020; 22:26776-26786. [DOI: 10.1039/d0cp04549g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A standalone program to calculate scalar relativistic effective contact densities.
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Affiliation(s)
- Hong Zhu
- Institute of Modern Physics
- Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers
- Xi'an
- P. R. China
| | - Chun Gao
- Institute of Modern Physics
- Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers
- Xi'an
- P. R. China
| | - Michael Filatov
- Department of Chemistry
- Kyungpook National University
- Daegu 702-701
- South Korea
| | - Wenli Zou
- Institute of Modern Physics
- Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers
- Xi'an
- P. R. China
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30
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Niu S, Cai HX, Zhao HB, Li L, Pan QJ. Redox and structural properties of accessible actinide(ii) metallocalixarenes (Ac to Pu): a relativistic DFT study. RSC Adv 2020; 10:26880-26887. [PMID: 35515776 PMCID: PMC9055483 DOI: 10.1039/d0ra05365a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/10/2020] [Indexed: 01/20/2023] Open
Abstract
The redox properties of actinides play a significant role in manipulating organometallic chemistry and energy/environment science, for being involved in fundamental concepts (oxidation state, bonding and reactivity), nuclear fuel cycles and contamination remediation. Herein, a series of trans-calix[2]pyrrole[2]benzene (H2L2) actinide complexes (An = Ac–Pu, and oxidation states of +II and +III) have been studied by relativistic density functional theory. Reduction potentials (E0) of [AnL2]+/[AnL2] were computed within −2.45 and −1.64 V versus Fc+/Fc in THF, comparable to experimental values of −2.50 V for [UL1e]/[UL1e]− (H3L1e = (Ad,MeArOH)3mesitylene and Ad = adamantyl) and −2.35 V for [U(CpiPr)2]+/[U(CpiPr)2] (CpiPr = C5iPr5). The E0 values show an overall increasing trend from Ac to Pu but a break point at Np being lower than adjacent elements. The arene/actinide mixed reduction mechanism is proposed, showing arenes predominant in Ac–Pa complexes but diverting to metal-centered domination in U–Pu ones. Besides being consistent with previously reported those of AnIII/AnII couples, the changing trend of our reduction potentials is corroborated by geometric data, topological analysis of bonds and electronic structures as well as additional calculations on actinide complexes ligated by tris(alkyloxide)arene, silyl-cyclopentadiene and octadentate Schiff-base polypyrrole in terms of electron affinity. The regularity would help to explore synthesis and property of novel actinide(ii) complex. DFT study reveals the trend of reduction potential of [AnL2]+/[AnL2] (An = Ac ∼ Pu), comparable to previously reported ones of AnIII/AnII and corroborated by calculations of relevant complexes and structural/bonding properties of [AnL2]+/0.![]()
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Affiliation(s)
- Shuai Niu
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- China
| | - Hong-Xue Cai
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- China
| | - Hong-Bo Zhao
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- China
| | - Li Li
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry of Education Ministry
- School of Chemistry and Materials Science
- Heilongjiang University
- Harbin 150080
- China
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31
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Tsoureas N, Mansikkamäki A, Layfield RA. Uranium(iv) cyclobutadienyl sandwich compounds: synthesis, structure and chemical bonding. Chem Commun (Camb) 2019; 56:944-947. [PMID: 31853530 DOI: 10.1039/c9cc09018e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The 1 : 1 reactions of uranium(iv) tetrakis(borohydride) with the sodium and potassium salts of the cyclobutadienyl anion [C4(SiMe3)4]2- (Cb'''') produce the half-sandwich complexes [Na(12-crown-4)2][U(η4-Cb'''')(BH4)3] and [U(η4-Cb'''')(μ-BH4)3{K(THF)2}]2. In the 1 : 2 reaction of U(BH4)4 with Na2Cb'''', formation of [U(η4-Cb'''')(η3-C4H(SiMe3)3-κ-(CH2SiMe2)(BH4))]- reveals that a Cb'''' ligand undergoes an intramolecular deprotonation, resulting in an allyl/tuck-in bonding mode. A computational study reveals that the uranium-Cb'''' bonding has an appreciable covalent component with contributions from the uranium 5f and 6d orbitals.
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Affiliation(s)
- Nikolaos Tsoureas
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QR, UK.
| | - Akseli Mansikkamäki
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, Jyväskylä, FI-40014, Finland.
| | - Richard A Layfield
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QR, UK.
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32
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Myers AJ, Tarlton ML, Kelley SP, Lukens WW, Walensky JR. Synthesis and Utility of Neptunium(III) Hydrocarbyl Complex. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexander J. Myers
- Department of Chemistry University of Missouri, Columbia 601 S. College Avenue Columbia MO 65211 USA
| | - Michael L. Tarlton
- Department of Chemistry University of Missouri, Columbia 601 S. College Avenue Columbia MO 65211 USA
| | - Steven P. Kelley
- Department of Chemistry University of Missouri, Columbia 601 S. College Avenue Columbia MO 65211 USA
| | - Wayne W. Lukens
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
| | - Justin R. Walensky
- Department of Chemistry University of Missouri, Columbia 601 S. College Avenue Columbia MO 65211 USA
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33
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Myers AJ, Tarlton ML, Kelley SP, Lukens WW, Walensky JR. Synthesis and Utility of Neptunium(III) Hydrocarbyl Complex. Angew Chem Int Ed Engl 2019; 58:14891-14895. [PMID: 31412157 DOI: 10.1002/anie.201906324] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/02/2019] [Indexed: 11/09/2022]
Abstract
To extend organoactinide chemistry beyond uranium, reported here is the first structurally characterized transuranic hydrocarbyl complex, Np[η4 -Me2 NC(H)C6 H5 ]3 (1), from reaction of NpCl4 (DME)2 with four equivalents of K[Me2 NC(H)C6 H5 ]. Unlike the UIII species, the neptunium analogue can be used to access other NpIII complexes. The reaction of 1 with three equivalents of HE2 C(2,6-Mes2 -C6 H3 ) (E=O, S) yields [(2,6-Mes2 -C6 H3 )CE2 ]3 Np(THF)2 , maintaining the trivalent oxidation state.
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Affiliation(s)
- Alexander J Myers
- Department of Chemistry, University of Missouri, Columbia, 601 S. College Avenue, Columbia, MO, 65211, USA
| | - Michael L Tarlton
- Department of Chemistry, University of Missouri, Columbia, 601 S. College Avenue, Columbia, MO, 65211, USA
| | - Steven P Kelley
- Department of Chemistry, University of Missouri, Columbia, 601 S. College Avenue, Columbia, MO, 65211, USA
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Justin R Walensky
- Department of Chemistry, University of Missouri, Columbia, 601 S. College Avenue, Columbia, MO, 65211, USA
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34
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Du X, Wang S, Zhang R, Li Q, Li Y, Ma C. Novel organotin (IV) complexes derived from 4,4′‐oxybisbenzoic acid: synthesis, structure,
in vitro
cytostatic activity and binding interaction with BSA. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiumei Du
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
| | - Shuo Wang
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
| | - Rufen Zhang
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
| | - Qianli Li
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
| | - Yongxin Li
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
| | - Chunlin Ma
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 China
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35
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Goodwin CAP, Su J, Albrecht-Schmitt TE, Blake AV, Batista ER, Daly SR, Dehnen S, Evans WJ, Gaunt AJ, Kozimor SA, Lichtenberger N, Scott BL, Yang P. [Am(C 5 Me 4 H) 3 ]: An Organometallic Americium Complex. Angew Chem Int Ed Engl 2019; 58:11695-11699. [PMID: 31190446 DOI: 10.1002/anie.201905225] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Indexed: 11/06/2022]
Abstract
We report the small-scale synthesis, isolated yield, single-crystal X-ray structure, 1 H NMR solution spectroscopy /solid-state UV/Vis-nIR spectroscopy, and density functional theory (DFT)/ab initio wave function theory calculations on an Am3+ organometallic complex, [Am(C5 Me4 H)3 ] (1). This constitutes the first quantitative data on Am-C bonding in a molecular species.
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Affiliation(s)
- Conrad A P Goodwin
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Thomas E Albrecht-Schmitt
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, FL, 32306, USA
| | - Anastasia V Blake
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.,Department of Chemistry, University of Iowa, E311 Chemistry Building, Iowa City, IA, 52245-1294, USA
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Scott R Daly
- Department of Chemistry, University of Iowa, E311 Chemistry Building, Iowa City, IA, 52245-1294, USA
| | - Stefanie Dehnen
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043, Marburg, Germany
| | - William J Evans
- Department of Chemistry, University of California, Irvine 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA
| | - Andrew J Gaunt
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Niels Lichtenberger
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.,Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043, Marburg, Germany
| | - Brian L Scott
- Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
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36
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Qin G, Cheng J. Thorium(iv) trialkyl complexes of non-carbocyclic ligands as highly active isoprene polymerisation catalysts. Dalton Trans 2019; 48:11706-11714. [PMID: 31274141 DOI: 10.1039/c9dt01617a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of mono-anionic non-carbocyclic ligands, including bidentate benzamidinate [PhC(NDipp)2] (Dipp = C6H3-2,6-iPr2), iminophosphinamide [Ph2P(NDipp)2] and phosphinoamide [Ph2PNDipp], and tridentate hydrotris(3,5-dimethyl-1-pyrazolyl)borate (TpMe2) were used to stabilize the corresponding thorium(iv) trialkyl complexes [PhC(NDipp)2]Th(CH2SiMe3)3 (1), [Ph2P(NDipp)2]Th(CH2SiMe3)3 (2), [Ph2P(NDipp)]Th(p-CH2-C6H4-Me)3 (3) and (TpMe2)Th(CH2SiMe3)3 (4), which were characterized by NMR spectroscopy and single-crystal X-ray analysis. Complexes 1-4 in combination with [Ph3C][B(C6F5)4] and AliBu3 form non-Cp-ligated actinide catalyst systems to show high activity and high cis-1,4-selectivity (89.9%) or trans-1,4-selectivity (91.4%) for the polymerization of isoprene. The reaction rate and selectivity of complexes 1 and 2 were controlled by the crowded space around the thorium centre, corroborated by the kinetics of the polymerization and the steric maps.
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Affiliation(s)
- Guorui Qin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun, 130022 China.
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37
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Bacha RUS, Bi YT, Xuan LC, Pan QJ. Inverse Trans Influence in Low-Valence Actinide-Group 10 Metal Complexes of Phosphinoaryl Oxides: A Theoretical Study via Tuning Metals and Donor Ligands. Inorg Chem 2019; 58:10028-10037. [PMID: 31298034 DOI: 10.1021/acs.inorgchem.9b01193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The recognition and in-depth understanding of inverse trans influence (ITI) have successfully guided the synthesis of novel actinide complexes and enriched actinide chemistry. Those complexes, however, are mainly limited to the involvement of high-valence actinide and/or metal-ligand multiple bonds. Examples containing both low oxidation state actinide and metal-metal single bond remain rare. Herein, more than 20 actinide-transition metal (An-TM) complexes of phosphinoaryl oxide ligands have been designed in accordance with several experimentally known analogs, by changing the metal atoms (An = Th, Pa, U, Np, and Pu; and TM = Ni, Pd, and Pt), actinide oxidation states (IV and III) and metal-metal axial donor ligands (X = Me3SiO, F, Cl, Br, and I). The relativistic density functional theory study of structural (trans-An-X and cis-An-O toward An-TM), bonding (topological electron/energy density), and electronic properties reveals the order of the ITI stabilizing actinide-metal bond. Computed electron affinity (EA) values, related to the electrochemical reduction, linearly correlate with experimentally measured reduction potentials. Although the same ITI order for the ligand donors was shown as in a previous study, the correlation between electrochemical reduction and the ITI was found to be weak when the actinide atoms were changed. For most complexes, the reduction is primarily of an actinide-based mechanism with minor participation of transition metal and phosphinoaryl oxide, whereas that of thorium-nickel complexes is different.
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Affiliation(s)
- Raza Ullah Shah Bacha
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , China
| | - Yan-Ting Bi
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , China
| | - Li-Chun Xuan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science , Heilongjiang University , Harbin 150080 , China
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38
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Goodwin CAP, Su J, Albrecht‐Schmitt TE, Blake AV, Batista ER, Daly SR, Dehnen S, Evans WJ, Gaunt AJ, Kozimor SA, Lichtenberger N, Scott BL, Yang P. [Am(C
5
Me
4
H)
3
]: An Organometallic Americium Complex. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905225] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | - Jing Su
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Thomas E. Albrecht‐Schmitt
- Department of Chemistry and Biochemistry Florida State University 95 Chieftain Way Tallahassee FL 32306 USA
| | - Anastasia V. Blake
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
- Department of Chemistry University of Iowa, E311 Chemistry Building Iowa City IA 52245-1294 USA
| | - Enrique R. Batista
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Scott R. Daly
- Department of Chemistry University of Iowa, E311 Chemistry Building Iowa City IA 52245-1294 USA
| | - Stefanie Dehnen
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - William J. Evans
- Department of Chemistry University of California, Irvine 1102 Natural Sciences II Irvine CA 92697-2025 USA
| | - Andrew J. Gaunt
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Stosh A. Kozimor
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Niels Lichtenberger
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Brian L. Scott
- Materials Physics and Applications Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Ping Yang
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
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39
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Guo F, Chen Y, Tong M, Mansikkamäki A, Layfield RA. Uranocenium: Synthesis, Structure, and Chemical Bonding. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903681] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fu‐Sheng Guo
- Department of ChemistryUniversity of Sussex Falmer Brighton BN1 9QR UK
| | - Yan‐Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of EducationSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Ming‐Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of EducationSchool of ChemistrySun Yat-Sen University Guangzhou 510275 P. R. China
| | - Akseli Mansikkamäki
- Department of Chemistry, Nanoscience CenterUniversity of Jyväskylä P.O. Box 35 Jyväskylä 40014 Finland
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40
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Guo FS, Chen YC, Tong ML, Mansikkamäki A, Layfield RA. Uranocenium: Synthesis, Structure, and Chemical Bonding. Angew Chem Int Ed Engl 2019; 58:10163-10167. [PMID: 31034690 DOI: 10.1002/anie.201903681] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Indexed: 11/10/2022]
Abstract
Abstraction of iodide from [(η5 -C5 i Pr5 )2 UI] (1) produced the cationic uranium(III) metallocene [(η5 -C5 i Pr5 )2 U]+ (2) as a salt of [B(C6 F5 )4 ]- . The structure of 2 consists of unsymmetrically bonded cyclopentadienyl ligands and a bending angle of 167.82° at uranium. Analysis of the bonding in 2 showed that the uranium 5f orbitals are strongly split and mixed with the ligand orbitals, thus leading to non-negligible covalent contributions to the bonding. Investigation of the dynamic magnetic properties of 2 revealed that the 5f covalency leads to partially quenched anisotropy and fast magnetic relaxation in zero applied magnetic field. Application of a magnetic field leads to dominant relaxation by a Raman process.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, University of Sussex, Falmer, Brighton, BN1 9QR, UK
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of the Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Akseli Mansikkamäki
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, Jyväskylä, 40014, Finland
| | - Richard A Layfield
- Department of Chemistry, University of Sussex, Falmer, Brighton, BN1 9QR, UK
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41
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Brewster JT, Zafar H, Root HD, Thiabaud GD, Sessler JL. Porphyrinoid f-Element Complexes. Inorg Chem 2019; 59:32-47. [DOI: 10.1021/acs.inorgchem.9b00884] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- James T. Brewster
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Hadiqa Zafar
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Harrison D. Root
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Gregory D. Thiabaud
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Jonathan L. Sessler
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States
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42
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Panthi D, Adeyiga O, Dandu NK, Odoh SO. Nitrogen Reduction by Multimetallic trans-Uranium Actinide Complexes: A Theoretical Comparison of Np and Pu to U. Inorg Chem 2019; 58:6731-6741. [PMID: 31050297 DOI: 10.1021/acs.inorgchem.9b00129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
There is recent interest in organometallic complexes of the trans-uranium elements. However, preparation and characterization of such complexes are hampered by radioactivity and chemotoxicity issues as well as the air-sensitive and poorly understood behavior of existing compounds. As such, there are no examples of small-molecule activation via redox reactivity of organometallic trans-uranium complexes. This contrasts with the situation for uranium. Indeed, a multimetallic uranium(III) nitride complex was recently synthesized, characterized, and shown to be able to capture and functionalize molecular nitrogen (N2) through a four-electron reduction process, N2 → N24-. The bis-uranium nitride, U-N-U core of this complex is held in a potassium siloxide framework. Importantly, the N24- product could be further functionalized to yield ammonia (NH3) and other desirable species. Using the U-N-U potassium siloxide complex, K3U-N-U, and its cesium analogue, Cs3U-N-U, as starting points, we use scalar-relativistic and spin-orbit coupled density functional theory calculations to shed light on the energetics and mechanism for N2 capture and functionalization. The N2 → N24- reactivity depends on the redox potentials of the U(III) centers and crucially on the stability of the starting complex with respect to decomposition into the mixed oxidation U(IV)/U(III) K2U-N-U or Cs2U-N-U species. For the trans-uranium, Np and Pu analogues of K3U-N-U, the N2 → N24- process is endoergic and would not occur. Interestingly, modification of the Np-O and Pu-O bonds between the actinide cores and the coordinated siloxide framework to Np-NH, Pu-NH, Np-CH2, and Pu-CH2 bonds drastically improves the reaction free energies. The Np-NH species are stable and can reductively capture and reduce N2 to N24-. This is supported by analysis of the spin densities, molecular structure, long-range dispersion effects, as well as spin-orbit coupling effects. These findings chart a path for achieving small-molecule activation with organometallic neptunium analogues of existing uranium complexes.
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Affiliation(s)
- Dipak Panthi
- Department of Chemistry , University of Nevada Reno , 1664 North Virginia Street , Reno , Nevada 89557-0216 , United States
| | - Olajumoke Adeyiga
- Department of Chemistry , University of Nevada Reno , 1664 North Virginia Street , Reno , Nevada 89557-0216 , United States
| | - Naveen K Dandu
- Department of Chemistry , University of Nevada Reno , 1664 North Virginia Street , Reno , Nevada 89557-0216 , United States
| | - Samuel O Odoh
- Department of Chemistry , University of Nevada Reno , 1664 North Virginia Street , Reno , Nevada 89557-0216 , United States
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43
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Leduc J, Frank M, Jürgensen L, Graf D, Raauf A, Mathur S. Chemistry of Actinide Centers in Heterogeneous Catalytic Transformations of Small Molecules. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04924] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jennifer Leduc
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
| | - Michael Frank
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
| | - Lasse Jürgensen
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
| | - David Graf
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
| | - Aida Raauf
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, D-50939 Cologne, Germany
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44
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Abstract
Recent developments and results from the organometallic chemistry of the actinides are reviewed. In the last one and a half years the structural data of about 15 organometallic complexes of transuranium actinides (Np or Pu) have been published, all involving π-ligands in the coordination sphere of the metal ion. On the basis of these data, a comparison of these molecules is presented. Depending on the steric demands of the ligands, effects like the actinide contraction seem to be stronger or weaker in the structural features. This indicates that the interplay between the actinide ion and the π-ligand is rather flexible, enabling the formation of stable bonds over a broad range of actinide ion oxidation states.
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Affiliation(s)
- Olaf Walter
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G. I. 5Postfach 234076125KarlsruheGermany
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45
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Ryan AJ, Angadol MA, Ziller JW, Evans WJ. Isolation of U(ii) compounds using strong donor ligands, C5Me4H and N(SiMe3)2, including a three-coordinate U(ii) complex. Chem Commun (Camb) 2019; 55:2325-2327. [DOI: 10.1039/c8cc08767a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New examples of uranium in the +2 oxidation state have been isolated by reduction of Cptet3U (Cptet = C5Me4H) and U(NR2)3 (R = SiMe3). Results show that more donating ligands as well as lower coordination number complexes are viable for U(ii) and suggest new targets for An(ii) complexes involving Np, Pu, and Am.
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Affiliation(s)
- Austin J. Ryan
- Department of Chemistry
- University of California
- Irvine
- USA
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46
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Nuzzo S, van Leusen J, Twamley B, Platts JA, Kögerler P, Baker RJ. Oxidation of uranium(iv) thiocyanate complexes: cation–cation interactions in mixed-valent uranium coordination chains. Dalton Trans 2019; 48:6704-6708. [DOI: 10.1039/c9dt01005j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Oxidation of Cs4[U(NCS)8] in different solvents results in two mixed-valent uranium compounds. Spectroscopic, magnetic and computational data support a unique [UIVUVUIV][UVI] oxidation state assignment in [U(DMF)8(μ-O)U(NCS)5(μ-O)U(DMF)7(NCS)][UO2(NCS)5].
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Affiliation(s)
- Stefano Nuzzo
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
| | - Jan van Leusen
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - Brendan Twamley
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
| | | | - Paul Kögerler
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - Robert J. Baker
- School of Chemistry
- University of Dublin
- Trinity College
- Dublin 2
- Ireland
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47
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Zheng M, Chen FY, Li L, Guo YR, Pan QJ. Accessibility of Uranyl–Plutonium Complex Supported by a Polypyrrolic Macrocycle: An Implication for Experimental Synthesis. Inorg Chem 2018; 58:950-959. [DOI: 10.1021/acs.inorgchem.8b03112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ming Zheng
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Fang-Yuan Chen
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Li Li
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yuan-Ru Guo
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
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48
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Wu L, Cao X, Chen X, Fang W, Dolg M. Visible‐Light Photocatalysis of C(sp
3
)‐H Fluorination by the Uranyl Ion: Mechanistic Insights. Angew Chem Int Ed Engl 2018; 57:11812-11816. [DOI: 10.1002/anie.201806554] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/05/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Liangliang Wu
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of EducationDepartment of ChemistryBeijing Normal University Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Xiaoyan Cao
- Theoretical ChemistryUniversity of Cologne Greinstrasse 4 50939 Cologne Germany
| | - Xuebo Chen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of EducationDepartment of ChemistryBeijing Normal University Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of EducationDepartment of ChemistryBeijing Normal University Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Michael Dolg
- Theoretical ChemistryUniversity of Cologne Greinstrasse 4 50939 Cologne Germany
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49
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Behrle AC, Myers AJ, Kerridge A, Walensky JR. Coordination Chemistry and QTAIM Analysis of Homoleptic Dithiocarbamate Complexes, M(S2CNiPr2)4 (M = Ti, Zr, Hf, Th, U, Np). Inorg Chem 2018; 57:10518-10524. [DOI: 10.1021/acs.inorgchem.8b00077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew C. Behrle
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
| | - Alexander J. Myers
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Lancaster LA1 4YB, U.K
| | - Justin R. Walensky
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211-7600, United States
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50
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Wu L, Cao X, Chen X, Fang W, Dolg M. Photokatalyse der C(sp3
)-H-Fluorierung durch Uranyl mit sichtbarem Licht: Einblicke in den Mechanismus. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Liangliang Wu
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education; Department of Chemistry; Beijing Normal University; Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Xiaoyan Cao
- Theoretische Chemie; Universität zu Köln; Greinstraße 4 50939 Cologne Germany
| | - Xuebo Chen
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education; Department of Chemistry; Beijing Normal University; Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Weihai Fang
- Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education; Department of Chemistry; Beijing Normal University; Xin-wai-da-jie No. 19 Beijing 100875 China
| | - Michael Dolg
- Theoretische Chemie; Universität zu Köln; Greinstraße 4 50939 Cologne Germany
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