1
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Golwankar RR, Ervin AC, Makoś MZ, Mikeska ER, Glezakou VA, Blakemore JD. Synthesis, Isolation, and Study of Heterobimetallic Uranyl Crown Ether Complexes. J Am Chem Soc 2024; 146:9597-9604. [PMID: 38546271 DOI: 10.1021/jacs.3c12075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Although crown ethers can selectively bind many metal cations, little is known regarding the solution properties of crown ether complexes of the uranyl dication, UO22+. Here, the synthesis and characterization of isolable complexes in which the uranyl dication is bound in an 18-crown-6-like moiety are reported. A tailored macrocyclic ligand, templated with a Pt(II) center, captures UO22+ in the crown moiety, as demonstrated by results from single-crystal X-ray diffraction analysis. The U(V) oxidation state becomes accessible at a quite positive potential (E1/2) of -0.18 V vs Fc+/0 upon complexation, representing the most positive UVI/UV potential yet reported for the UO2n+ core. Isolation and characterization of the U(V) form of the crown complex are also reported here; there are no prior reports of reduced uranyl crown ether complexes, but U(V) is clearly stabilized by crown chelation. Joint computational studies show that the electronic structure of the U(V) form results in significant weakening of U-Ooxo bonding despite the quite positive reduction potential at which this species can be accessed, underscoring that crown-ligated uranyl species could demonstrate unique reactivity under only modestly reducing conditions.
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Affiliation(s)
- Riddhi R Golwankar
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Alexander C Ervin
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Małgorzata Z Makoś
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Emily R Mikeska
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | | | - James D Blakemore
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
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2
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Fetrow TV, Zgrabik J, Bhowmick R, Eckstrom FD, Crull G, Vlaisavljevich B, Daly SR. Quantifying the Influence of Covalent Metal-Ligand Bonding on Differing Reactivity of Trivalent Uranium and Lanthanide Complexes. Angew Chem Int Ed Engl 2022; 61:e202211145. [PMID: 36097137 PMCID: PMC9828012 DOI: 10.1002/anie.202211145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Indexed: 01/12/2023]
Abstract
Qualitative differences in the reactivity of trivalent lanthanide and actinide complexes have long been attributed to differences in covalent metal-ligand bonding, but there are few examples where thermodynamic aspects of this relationship have been quantified, especially with U3+ and in the absence of competing variables. Here we report a series of dimeric phosphinodiboranate complexes with trivalent f-metals that show how shorter-than-expected U-B distances indicative of increased covalency give rise to measurable differences in solution deoligomerization reactivity when compared to isostructural complexes with similarly sized lanthanides. These results, which are in excellent agreement with supporting DFT and QTAIM calculations, afford rare experimental evidence concerning the measured effect of variations in metal-ligand covalency on the reactivity of trivalent uranium and lanthanide complexes.
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Affiliation(s)
- Taylor V. Fetrow
- Department of ChemistryThe University of IowaE331 Chemistry BuildingIowa CityIA 52242USA
| | - Joshua Zgrabik
- Department of ChemistryThe University of IowaE331 Chemistry BuildingIowa CityIA 52242USA
| | - Rina Bhowmick
- Department of ChemistryThe University of South Dakota414 East Clark StreetVermillionSouth Dakota57069USA
| | - Francesca D. Eckstrom
- Department of ChemistryThe University of IowaE331 Chemistry BuildingIowa CityIA 52242USA
| | - George Crull
- Department of ChemistryThe University of IowaE331 Chemistry BuildingIowa CityIA 52242USA
| | - Bess Vlaisavljevich
- Department of ChemistryThe University of South Dakota414 East Clark StreetVermillionSouth Dakota57069USA
| | - Scott R. Daly
- Department of ChemistryThe University of IowaE331 Chemistry BuildingIowa CityIA 52242USA
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3
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Abstract
The number of rare earth (RE) starting materials used in synthesis is staggering, ranging from simple binary metal-halide salts to borohydrides and "designer reagents" such as alkyl and organoaluminate complexes. This review collates the most important starting materials used in RE synthetic chemistry, including essential information on their preparations and uses in modern synthetic methodologies. The review is divided by starting material category and supporting ligands (i.e., metals as synthetic precursors, halides, borohydrides, nitrogen donors, oxygen donors, triflates, and organometallic reagents), and in each section relevant synthetic methodologies and applications are discussed.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, U.K.
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4
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Long J, Selikhov AN, Rad'kova NY, Cherkasov AV, Guari Y, Larionova J, Trifonov AA. Synthesis, Structures and Magnetic Properties of two Heteroleptic Dy
3+
Borohydride Complexes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jérôme Long
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | - Alexander N. Selikhov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
| | - Natalia Yu. Rad'kova
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
| | - Yannick Guari
- ICGM Univ. Montpellier CNRS, ENSCM Montpellier France
| | | | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences 49 Tropinina str., GSP-445 630950 Nizhny Novgorod Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences 28 Vavilova str. 119334 Moscow Russia
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5
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Density functional study on Am(III)/Eu(III) selectivity using crown ether type ligands. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07685-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Martin CR, Leith GA, Shustova NB. Beyond structural motifs: the frontier of actinide-containing metal-organic frameworks. Chem Sci 2021; 12:7214-7230. [PMID: 34163816 PMCID: PMC8171348 DOI: 10.1039/d1sc01827b] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/13/2021] [Indexed: 12/13/2022] Open
Abstract
In this perspective, we feature recent advances in the field of actinide-containing metal-organic frameworks (An-MOFs) with a main focus on their electronic, catalytic, photophysical, and sorption properties. This discussion deviates from a strictly crystallographic analysis of An-MOFs, reported in several reviews, or synthesis of novel structural motifs, and instead delves into the remarkable potential of An-MOFs for evolving the nuclear waste administration sector. Currently, the An-MOF field is dominated by thorium- and uranium-containing structures, with only a few reports on transuranic frameworks. However, some of the reported properties in the field of An-MOFs foreshadow potential implementation of these materials and are the main focus of this report. Thus, this perspective intends to provide a glimpse into the challenges, triumphs, and future directions of An-MOFs in sectors ranging from the traditional realm of gas sorption and separation to recently emerging areas such as electronics and photophysics.
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Affiliation(s)
- Corey R Martin
- Department of Chemistry and Biochemistry, University of South Carolina Columbia South Carolina 29208 USA
| | - Gabrielle A Leith
- Department of Chemistry and Biochemistry, University of South Carolina Columbia South Carolina 29208 USA
| | - Natalia B Shustova
- Department of Chemistry and Biochemistry, University of South Carolina Columbia South Carolina 29208 USA
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7
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Yang L, Cooper S, Kaltsoyannis N. High coordination number actinide-noble gas complexes; a computational study. Phys Chem Chem Phys 2021; 23:4167-4177. [PMID: 33585844 DOI: 10.1039/d0cp06175a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The geometries, electronic structures and bonding of early actinide-noble gas complexes are studied computationally by density functional and wavefunction theory methods, and by ab initio molecular dynamics. AcHe183+ is confirmed as being an 18-coordinate system, with all of the He atoms accommodated in the primary coordination shell, and this record coordination number is reported for the first time for Th4+ and Th3+. For Pa and U in their group valences of 5 and 6 respectively, the largest number of coordinated He atoms is 17. For AnHe17q+ (An = Ac, q = 3; An = Th, q = 4; An = Pa, q = 5; An = U, q = 6), the average An-He binding energy increases significantly across the series, and correlates linearly with the extent of He → Anq+ charge transfer. The interatomic exchange-correlation term Vxc obtained from the interacting quantum atoms approach correlates linearly with the An-He quantum theory of atoms-in-molecules delocalization index, both indicating that covalency increases from AcHe173+ to UHe176+. The correlation energy in AnHe163+ obtained from MP2 calculations decreases in the order Pa > Th > U > Ac, the same trend found in Vxc. The most stable complexes of Ac3+ with the heavier noble gases Ar-Xe are 12 coordinate, best described as Ng12 cages encapsulating an Ac3+ ion. There is enhanced Ng → Ac3+ charge transfer as the Ng gets heavier, and Ac-Ng covalency increases.
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Affiliation(s)
- Lin Yang
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
| | - Sophie Cooper
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
| | - Nikolas Kaltsoyannis
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
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8
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Zhang P, Liu H, Zou W, Zhang P, Hu SX. Relativistic Effects Stabilize the Planar Wheel-like Structure of Actinide-Doped Gold Clusters: An@Au 7 (An = Th to Cm). J Phys Chem A 2020; 124:8173-8183. [PMID: 32845148 DOI: 10.1021/acs.jpca.0c02148] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite the chemistry of actinide-ligand bonding is continuing and of burgeoning interest, investigations of the chemical bonding of bimetallic complexes involving transuranics remain relatively less, and there are rarely studies on the bonding features between actinide and coinage metals (CM). We present a systematic research on the series of An@Au7 (An = Th to Cm), UCM7 (CM = Cu, Ag, Au), and WAu7 clusters to investigate the unique geometries, electronic structures, and chemical bonding between An 5f6d orbitals and CM ns orbitals, and to find their periodicity across the actinides and within the group of transition metals. A unique planar wheel-like structure for An@Au7 clusters with the help of actinide metals encapsulation via spin-orbit coupling, resulting in An(III). Instead, the transition-metal (TM) element W retains its usual six-gold-coordination structure in WAu7, thus forcing the seventh Au out of plane. The An-CM interactions, depending on the ion radii, become stronger with the increase of the atomic number of the actinide metals, as well as the CM. These results show that the presence of actinides in clusters can lead to unique electronic and geometrical structures.
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Affiliation(s)
- Peng Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Haitao Liu
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Wenli Zou
- Institute of Modern Physics, Northwest University and Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an 710127, China
| | - Ping Zhang
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - Shu-Xian Hu
- Beijing Computational Science Research Center, Beijing 100193, China
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9
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Hu SX, Zhang P, Zou W, Zhang P. New theoretical insights into high-coordination-number complexes in actinides-centered borane. NANOSCALE 2020; 12:15054-15065. [PMID: 32400819 DOI: 10.1039/d0nr01955k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The coordination number of a given element affects its behavior, and consequently, there is great interest in understanding the related chemistry, which could greatly promote the extension and development of new materials, but remains challenging. Herein, we report a new record high coordination number (CN) for actinides established in the cage-like An(BH)24 (An = Th to Cm) via using relativistic quantum chemistry methods. Analysis of U(BH)n (n = 1 to 24) confirmed these series of systems as being geometric minima, with the BH acting as a ligand located in the first shell around the uranium. In contrast, global searches revealed a low CN half-cage structure for UB24, which could be extended to the series of AnB24 materials and which prevails over the competing structural isomers, such as cages. The intrinsic geometric difference for AnB24 and An(BH)24 mainly arise from the B sp3 hybridization in borane inducing strong interactions between An 5f6d7s hybrid orbitals and B 2pz orbitals in An(BH)24 compared to that of AnB24. This fundamental trend presents a valuable insight for future experimental endeavors searching for isolable complexes with high-coordination actinide and provides details of a new structural motif of boron clusters and nanostructures.
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Affiliation(s)
- Shu-Xian Hu
- School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China and Beijing Computational Science Research Center, Beijing 100193, China. and Institute of Modern Physics, Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an, 710127, China
| | - Peng Zhang
- Beijing Computational Science Research Center, Beijing 100193, China.
| | - Wenli Zou
- Institute of Modern Physics, Northwest University, and Shaanxi Key Laboratory for Theoretical Physics Frontiers, Xi'an, 710127, China
| | - Ping Zhang
- Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
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10
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Arnold PL, Wang K, Gray SJ, Moreau LM, Booth CH, Curcio M, Wells JAL, Slawin AMZ. Dicerium letterbox-shaped tetraphenolates: f-block complexes designed for two-electron chemistry. Dalton Trans 2020; 49:877-884. [PMID: 31859325 DOI: 10.1039/c9dt03291f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rare examples of molecular, dinuclear CeIII and PrIII complexes with robust Ln-coordination are accessible by use of the tetraphenolate pTP as a supporting, chelating O-donor ligand platform, pTP = [{2-(OC6H2R2-2,4)2CH}-C6H4-1,4]4- that favours the higher formal oxidation states accessible to rare earths. Two classes of complexes have been made from the platforms; one metallacyclic 2 + 2 [Ln2(pTP)2] framework with a rigid, letterbox-shaped geometry and [Ln(aryloxide)4] core, and one more flexible [(LnX)2(pTP)] with one rare earth ion at either end of the platform. The LnIII letterbox complexes have two K+ counter-cations, one of which sits inside the letterbox, binding the two central arenes of the platform sufficiently strongly that it cannot be displaced by solvent molecules (THF and pyridine) or crown ethers. Oxidation of the CeIII lettterboxes is facile and forms the unusual neutral molecular (CeIV)2 letterbox in which the CeIV reduction potential is -1.83 V vs. Fc/Fc+. The electronic structure of the Ce(iii/iv) complexes was investigated using HERFD-XAS (high energy resolution fluorescence detection X-ray absorption spectroscopy).
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Affiliation(s)
- Polly L Arnold
- School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, UK.
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11
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Yu KX, Ding YS, Zhai YQ, Han T, Zheng YZ. Equatorial coordination optimization for enhanced axiality of mononuclear Dy(iii) single-molecule magnets. Dalton Trans 2020; 49:3222-3227. [DOI: 10.1039/d0dt00011f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The optimization of equatorial sites leads to significant improvement of the magnetic properties of Dy(iii) SMMs.
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Affiliation(s)
- Ke-Xin Yu
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - You-Song Ding
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Yuan-Qi Zhai
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Tian Han
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST)
- School of Science
- Research Institute of Xi'an Jiaotong University (Zhejiang)
- State Key Laboratory of Mechanical Behavior for Materials
- MOE Key Laboratory for Nonequilibrium Synthesis of Condensed Matter
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12
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Huang P. Understanding the Stability Trend Along Light Lanthanide Complexes with an Ehtylenediamine‐Type Ligand: A Quantum Chemical Study. ChemistrySelect 2019. [DOI: 10.1002/slct.201902887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pin‐Wen Huang
- Zhejiang University of Water Resources and Electric Power Hangzhou 310018 Zhejiang China
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13
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Fetrow TV, Bhowmick R, Achazi AJ, Blake AV, Eckstrom FD, Vlaisavljevich B, Daly SR. Chelating Borohydrides for Lanthanides and Actinides: Structures, Mechanochemistry, and Case Studies with Phosphinodiboranates. Inorg Chem 2019; 59:48-61. [DOI: 10.1021/acs.inorgchem.9b01628] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Taylor V. Fetrow
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Rina Bhowmick
- Department of Chemistry, The University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Andreas J. Achazi
- Department of Chemistry, The University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Anastasia V. Blake
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Francesca D. Eckstrom
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
| | - Bess Vlaisavljevich
- Department of Chemistry, The University of South Dakota, 414 East Clark Street, Vermillion, South Dakota 57069, United States
| | - Scott R. Daly
- Department of Chemistry, The University of Iowa, E331 Chemistry Building, Iowa City, Iowa 52242, United States
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14
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Li J, Gómez-Coca S, Dolinar BS, Yang L, Yu F, Kong M, Zhang YQ, Song Y, Dunbar KR. Hexagonal Bipyramidal Dy(III) Complexes as a Structural Archetype for Single-Molecule Magnets. Inorg Chem 2019; 58:2610-2617. [DOI: 10.1021/acs.inorgchem.8b03206] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Silvia Gómez-Coca
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842, United States
- Department of Chemistry, King’s College London, London SE1 1DB, United Kingdom
| | - Brian S. Dolinar
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842, United States
| | | | | | | | | | | | - Kim R. Dunbar
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842, United States
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15
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Tanaka R, Shinto Y, Matsuzaki R, Nakayama Y, Shiono T. Stereospecific polymerization of conjugated dienes using neodymium alkylborohydride complexes. Dalton Trans 2019; 48:7267-7273. [DOI: 10.1039/c8dt04220a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Two neodymium alkylborohydride complexes that differ with respect to the number of hydrides on the boron center were synthesized and characterized.
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Affiliation(s)
- Ryo Tanaka
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Yuto Shinto
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Ryusei Matsuzaki
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Yuushou Nakayama
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Takeshi Shiono
- Department of Applied Chemistry
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
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16
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Penchoff DA, Peterson CC, Quint MS, Auxier JD, Schweitzer GK, Jenkins DM, Harrison RJ, Hall HL. Structural Characteristics, Population Analysis, and Binding Energies of [An(NO 3)] 2+ (with An = Ac to Lr). ACS OMEGA 2018; 3:14127-14143. [PMID: 31458106 PMCID: PMC6645087 DOI: 10.1021/acsomega.8b01800] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 09/12/2018] [Indexed: 05/21/2023]
Abstract
Efficient predictive capabilities are essential for the actinide series since regulatory constraints for radioactive work, associated costs needed for specialized facilities, and the short half-lives of many actinides present great challenges in laboratory settings. Improved predictive accuracy is advantageous for numerous applications including the optimization and design of separation agents for nuclear fuel and waste. One limitation of calculations in support of these applications is that the large variations observed from predictions obtained with currently available methods can make comparisons across studies uncertain. Benchmarking currently available computational methodologies is essential to establish reliable practices across the community to guarantee an accurate physical description of the systems studied. To understand the performance of a variety of common theoretical methods, a systematic analysis of differences observed in the prediction of structural characteristics, electron withdrawing effects, and binding energies of [An(NO3)]2+ (with An = Ac to Lr) in gas and aqueous phases is reported. Population analysis obtained with Mulliken and Löwdin reflect a large dependence on the level of theory of choice, whereas those obtained with natural bond orbital show larger consistency across methodologies. Predicted stability across the actinide series calculated with coupled cluster with perturbative doubles and triples at the triple ζ level is equivalent to the one obtained when extrapolated to the complete basis set limit. The ground state of [Fm(NO3)]2+ and [Md(NO3)]2+ is predicted to have an electronic structure corresponding to An III state in gas and An IV in aqueous phase, whereas the ground state of [An(NO3)]2+ (with An = Ac to Es, Lr) presents an electronic structure corresponding to An IV in the gas and aqueous phase. The compounds studied with No in gas and aqueous phase present a preferred No III state, and the Lr compounds did not follow trends predicted for the rest of the actinide series, as previously observed in studies regarding its unusual electronic structure relative to its position in the periodic table.
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Affiliation(s)
- Deborah A. Penchoff
- Institute
for Nuclear Security, University of Tennessee, 1640 Cumberland Avenue, Knoxville, Tennessee 37996, United States
- Joint
Institute for Computational Sciences, Oak
Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Charles C. Peterson
- Research
Information Technology Services, University
of North Texas, 225 South Avenue B, Denton, Texas 76201, United
States
| | - Mark S. Quint
- Department
of Nuclear Engineering, University of Tennessee, 301 Middle Drive, Pasqua Nuclear
Engineering Building, Knoxville, Tennessee 37996, United States
- US
Army Nuclear and Countering Weapons of Mass Destruction Agency (USANCA), United States Army, Ft. Jackson, South Carolina 29715, United States
| | - John D. Auxier
- Radiochemistry
Center of Excellence (RCOE), University
of Tennessee, 1508 Middle
Drive, Ferris Hall, Knoxville, Tennessee 37996, United States
| | - George K. Schweitzer
- Department
of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, Tennessee 37996, United States
| | - David M. Jenkins
- Department
of Chemistry, University of Tennessee, 1420 Circle Drive, Knoxville, Tennessee 37996, United States
| | - Robert J. Harrison
- Institute
for Advanced Computational Science, Stony
Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United
States
- Brookhaven
National Laboratory, Computational Science, Building 725, Upton, New York 11973, United States
| | - Howard L. Hall
- Institute
for Nuclear Security, University of Tennessee, 1640 Cumberland Avenue, Knoxville, Tennessee 37996, United States
- Radiochemistry
Center of Excellence (RCOE), University
of Tennessee, 1508 Middle
Drive, Ferris Hall, Knoxville, Tennessee 37996, United States
- Y-12
National Security Complex, Oak
Ridge, Tennessee 37830, United States
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17
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Maxwell L, Amoza M, Ruiz E. Mononuclear Lanthanide Complexes with 18-Crown-6 Ether: Synthesis, Characterization, Magnetic Properties, and Theoretical Studies. Inorg Chem 2018; 57:13225-13234. [DOI: 10.1021/acs.inorgchem.8b01688] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lindley Maxwell
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
- Advanced Lithium and Industrial Minerals Research Center, Universidad de Antofagasta, Avenida Universidad de Antofagasta, 02800 Antofagasta, Chile
| | - Martín Amoza
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica and Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, E-08028 Barcelona, Spain
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18
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Decomposition of d- and f-Shell Contributions to Uranium Bonding from the Quantum Theory of Atoms in Molecules: Application to Uranium and Uranyl Halides. INORGANICS 2018. [DOI: 10.3390/inorganics6030088] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The electronic structures of a series of uranium hexahalide and uranyl tetrahalide complexes were simulated at the density functional theoretical (DFT) level. The resulting electronic structures were analyzed using a novel application of the Quantum Theory of Atoms in Molecules (QTAIM) by exploiting the high symmetry of the complexes to determine 5f- and 6d-shell contributions to bonding via symmetry arguments. This analysis revealed fluoride ligation to result in strong bonds with a significant covalent character while ligation by chloride and bromide species resulted in more ionic interactions with little differentiation between the ligands. Fluoride ligands were also found to be most capable of perturbing an existing electronic structure. 5f contributions to overlap-driven covalency were found to be larger than 6d contributions for all interactions in all complexes studied while degeneracy-driven covalent contributions showed significantly greater variation. σ-contributions to degeneracy-driven covalency were found to be consistently larger than those of individual π-components while the total π-contribution was, in some cases, larger. Strong correlations were found between overlap-driven covalent bond contributions, U–O vibrational frequencies, and energetic stability, which indicates that overlap-driven covalency leads to bond stabilization in these complexes and that uranyl vibrational frequencies can be used to quantitatively probe equatorial bond covalency. For uranium hexahalides, degeneracy-driven covalency was found to anti-correlate with bond stability.
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19
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Chen XM, Ma N, Zhang QF, Wang J, Feng X, Wei C, Wang LS, Zhang J, Chen X. Elucidation of the Formation Mechanisms of the Octahydrotriborate Anion (B 3H 8-) through the Nucleophilicity of the B-H Bond. J Am Chem Soc 2018; 140:6718-6726. [PMID: 29732884 DOI: 10.1021/jacs.8b03785] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Boron compounds are well-known electrophiles. Much less known are their nucleophilic properties. By recognition of the nucleophilicity of the B-H bond, the formation mechanism of octahydrotriborate (B3H8-) was elucidated on the bases of both experimental and computational investigations. Two possible routes from the reaction of BH4- and THF·BH3 to B3H8- were proposed, both involving the B2H6 and BH4- intermediates. The two pathways consist of a set of complicated intermediates, which can convert to each other reversibly at room temperature and can be represented by a reaction circle. Only under reflux can the B2H6 and BH4- intermediates be converted to B2H5- and BH3(H2) via a high energy barrier, from which H2 elimination occurs to yield the B3H8- final product. The formation of B2H6 from THF·BH3 by nucleophilic substitution of the B-H bond was captured and identified, and the reaction of B2H6 with BH4- to produce B3H8- was confirmed experimentally. On the bases of the formation mechanisms of B3H8-, we have developed a facile synthetic method for MB3H8 (M = Li and Na) in high yields by directly reacting the corresponding MBH4 salts with THF·BH3. In the new synthetic method for MB3H8, no electron carriers are needed, allowing convenient preparation of MB3H8 in large scales and paving the way for their wide applications.
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Affiliation(s)
- Xi-Meng Chen
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Nana Ma
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Qian-Fan Zhang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Jin Wang
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Xiaoge Feng
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Changgeng Wei
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Lai-Sheng Wang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Jie Zhang
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Xuenian Chen
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials , Henan Normal University , Xinxiang , Henan 453007 , China
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20
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Blake AV, Fetrow TV, Theiler ZJ, Vlaisavljevich B, Daly SR. Homoleptic uranium and lanthanide phosphinodiboranates. Chem Commun (Camb) 2018; 54:5602-5605. [DOI: 10.1039/c8cc02862a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and structures of a new class of homoleptic f-metal borohydride complexes (phosphinodiboranates) are described with U, Nd, and Er.
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Affiliation(s)
| | | | | | | | - Scott R. Daly
- Department of Chemistry
- The University of Iowa
- Iowa City
- USA
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21
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Cyanide linkage isomerism in cerium(III) and uranium(III) complexes. A relativistic DFT study. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Stuber MA, Kornienko AY, Emge TJ, Brennan JG. Tetrametallic Thorium Compounds with Th 4E 4 (E = S, Se) Cubane Cores. Inorg Chem 2017; 56:10247-10256. [PMID: 28832125 DOI: 10.1021/acs.inorgchem.7b00950] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tetrametallic thorium compounds with a Th4E4 core (E = S, Se) having a distorted cubane structure can be prepared by ligand-based reductions of elemental E with thorium chalcogenolates, prepared by in situ oxidation of Th metal with a 3:1 mixture of PhEEPh and F5C6EEC6F5. Four compounds, (py)8Th4S4(μ2-SPh)4(SC6F5)4, (py)8Th4S4(μ2-SPh)4(SeC6F5)4, (py)8Th4Se4(μ2-SePh)4(SeC6F5)4, and (py)8Th4Se4(μ2-SePh)4(SC6F5)4, were isolated and characterized by NMR spectroscopy and X-ray diffraction. These compounds clearly demonstrate the chemical impact of ring fluorination, with the less-nucleophilic EC6F5 ligands occupying the terminal binding sites and the EPh ligands bridging two metal centers. For this series of compounds, crystal packing and intermolecular π···π and H-bonding interactions result in a consistent motif and crystallization in a body-centered tetragonal unit cell. Solution-state 77Se NMR spectroscopy reveals that the solid-state structures are maintained in pyridine.
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Affiliation(s)
- Matthew A Stuber
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Anna Y Kornienko
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Thomas J Emge
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - John G Brennan
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey , 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
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23
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Arnold PL, Stevens CJ, Bell NL, Lord RM, Goldberg JM, Nichol GS, Love JB. Multi-electron reduction of sulfur and carbon disulfide using binuclear uranium(iii) borohydride complexes. Chem Sci 2017; 8:3609-3617. [PMID: 30155206 PMCID: PMC6094157 DOI: 10.1039/c7sc00382j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/01/2017] [Indexed: 11/23/2022] Open
Abstract
The first use of a dinuclear UIII/UIII complex in the activation of small molecules is reported. The octadentate Schiff-base pyrrole, anthracene-hinged 'Pacman' ligand LA combines two strongly reducing UIII centres and three borohydride ligands in [M(THF)4][{U(BH4)}2(μ-BH4)(LA)(THF)2] 1-M, (M = Li, Na, K). The two borohydride ligands bound to uranium outside the macrocyclic cleft are readily substituted by aryloxide ligands, resulting in a single, weakly-bound, encapsulated endo group 1 metal borohydride bridging the two UIII centres in [{U(OAr)}2(μ-MBH4)(LA)(THF)2] 2-M (OAr = OC6H2t Bu3-2,4,6, M = Na, K). X-ray crystallographic analysis shows that, for 2-K, in addition to the endo-BH4 ligand the potassium counter-cation is also incorporated into the cleft through η5-interactions with the pyrrolides instead of extraneous donor solvent. As such, 2-K has a significantly higher solubility in non-polar solvents and a wider U-U separation compared to the 'ate' complex 1. The cooperative reducing capability of the two UIII centres now enforced by the large and relatively flexible macrocycle is compared for the two complexes, recognising that the borohydrides can provide additional reducing capability, and that the aryloxide-capped 2-K is constrained to reactions within the cleft. The reaction between 1-Na and S8 affords an insoluble, presumably polymeric paramagnetic complex with bridging uranium sulfides, while that with CS2 results in oxidation of each UIII to the notably high UV oxidation state, forming the unusual trithiocarbonate (CS3)2- as a ligand in [{U(CS3)}2(μ-κ2:κ2-CS3)(LA)] (4). The reaction between 2-K and S8 results in quantitative substitution of the endo-KBH4 by a bridging persulfido (S2)2- group and oxidation of each UIII to UIV, yielding [{U(OAr)}2(μ-κ2:κ2-S2)(LA)] (5). The reaction of 2-K with CS2 affords a thermally unstable adduct which is tentatively assigned as containing a carbon disulfido (CS2)2- ligand bridging the two U centres (6a), but only the mono-bridged sulfido (S)2- complex [{U(OAr)}2(μ-S)(LA)] (6) is isolated. The persulfido complex (5) can also be synthesised from the mono-bridged sulfido complex (6) by the addition of another equivalent of sulfur.
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
| | - Charlotte J Stevens
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
| | - Nicola L Bell
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
| | - Rianne M Lord
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
| | - Jonathan M Goldberg
- Department of Chemistry , University of Washington , Box 351700 , Seattle , WA 98195-1700 , USA
| | - Gary S Nichol
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
| | - Jason B Love
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings , Edinburgh EH9 3JF , UK . ; ; ; Tel: +44 (0)131 6505429
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24
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Rehe D, Kornienko AY, Emge TJ, Brennan JG. Thorium Compounds with Bonds to Sulfur or Selenium: Synthesis, Structure, and Thermolysis. Inorg Chem 2016; 55:6961-7. [DOI: 10.1021/acs.inorgchem.6b00645] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Rehe
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Anna Y. Kornienko
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Thomas J. Emge
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - John G. Brennan
- Department of Chemistry and Chemical Biology, Rutgers, the State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
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25
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26
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Gregson M, Lu E, Tuna F, McInnes EJL, Hennig C, Scheinost AC, McMaster J, Lewis W, Blake AJ, Kerridge A, Liddle ST. Emergence of comparable covalency in isostructural cerium(iv)- and uranium(iv)-carbon multiple bonds. Chem Sci 2016; 7:3286-3297. [PMID: 29997821 PMCID: PMC6006499 DOI: 10.1039/c6sc00278a] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 02/04/2016] [Indexed: 11/26/2022] Open
Abstract
We report comparable levels of covalency in cerium- and uranium-carbon multiple bonds in the iso-structural carbene complexes [M(BIPMTMS)(ODipp)2] [M = Ce (1), U (2), Th (3); BIPMTMS = C(PPh2NSiMe3)2; Dipp = C6H3-2,6-iPr2] whereas for M = Th the M[double bond, length as m-dash]C bond interaction is much more ionic. On the basis of single crystal X-ray diffraction, NMR, IR, EPR, and XANES spectroscopies, and SQUID magnetometry complexes 1-3 are confirmed formally as bona fide metal(iv) complexes. In order to avoid the deficiencies of orbital-based theoretical analysis approaches we probed the bonding of 1-3 via analysis of RASSCF- and CASSCF-derived densities that explicitly treats the orbital energy near-degeneracy and overlap contributions to covalency. For these complexes similar levels of covalency are found for cerium(iv) and uranium(iv), whereas thorium(iv) is found to be more ionic, and this trend is independently found in all computational methods employed. The computationally determined trends in covalency of these systems of Ce ∼ U > Th are also reproduced in experimental exchange reactions of 1-3 with MCl4 salts where 1 and 2 do not exchange with ThCl4, but 3 does exchange with MCl4 (M = Ce, U) and 1 and 2 react with UCl4 and CeCl4, respectively, to establish equilibria. This study therefore provides complementary theoretical and experimental evidence that contrasts to the accepted description that generally lanthanide-ligand bonding in non-zero oxidation state complexes is overwhelmingly ionic but that of uranium is more covalent.
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Affiliation(s)
- Matthew Gregson
- School of Chemistry , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Erli Lu
- School of Chemistry , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Floriana Tuna
- EPSRC National UK EPR Facility , School of Chemistry and Photon Science Institute , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Eric J L McInnes
- EPSRC National UK EPR Facility , School of Chemistry and Photon Science Institute , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Christoph Hennig
- Helmholtz-Zentrum Dresden-Rossendorf , Institute of Resource Ecology , Bautzner Landstrasse 400 , D-01314 Dresden , Germany
- The Rossendorf Beamline , ESRF , BP 220 , F-38043 Grenoble , France
| | - Andreas C Scheinost
- Helmholtz-Zentrum Dresden-Rossendorf , Institute of Resource Ecology , Bautzner Landstrasse 400 , D-01314 Dresden , Germany
- The Rossendorf Beamline , ESRF , BP 220 , F-38043 Grenoble , France
| | - Jonathan McMaster
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK
| | - William Lewis
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK
| | - Alexander J Blake
- School of Chemistry , University of Nottingham , University Park , Nottingham , NG7 2RD , UK
| | - Andrew Kerridge
- Department of Chemistry , Lancaster University , Lancaster , LA1 4YB , UK .
| | - Stephen T Liddle
- School of Chemistry , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
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27
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Chang YP, Levason W, Reid G. Developments in the chemistry of the hard early metals (Groups 1–6) with thioether, selenoether and telluroether ligands. Dalton Trans 2016; 45:18393-18416. [DOI: 10.1039/c6dt03409h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Key developments in the coordination chemistry of the soft, neutral chalcogenoether ligands towards hard s-, f- and early d-block ions, and their prospects for various applications are discussed.
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Affiliation(s)
- Yao-Pang Chang
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - William Levason
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
| | - Gillian Reid
- School of Chemistry
- University of Southampton
- Southampton SO17 1BJ
- UK
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28
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Lan JH, Wang CZ, Wu QY, Wang SA, Feng YX, Zhao YL, Chai ZF, Shi WQ. A Quasi-relativistic Density Functional Theory Study of the Actinyl(VI, V) (An = U, Np, Pu) Complexes with a Six-Membered Macrocycle Containing Pyrrole, Pyridine, and Furan Subunits. J Phys Chem A 2015. [DOI: 10.1021/acs.jpca.5b06370] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian-Hui Lan
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cong-Zhi Wang
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qun-Yan Wu
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Shu-Ao Wang
- School
of Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative
Innovation Center of Radiation Medicine of Jiangsu Higher Education
Institutions, Soochow University, Suzhou 215123, China
| | - Yi-Xiao Feng
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Liang Zhao
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Fang Chai
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- School
of Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative
Innovation Center of Radiation Medicine of Jiangsu Higher Education
Institutions, Soochow University, Suzhou 215123, China
| | - Wei-Qun Shi
- Laboratory
of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects
of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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29
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Hervé A, Bouzidi Y, Berthet JC, Belkhiri L, Thuéry P, Boucekkine A, Ephritikhine M. U(III)-CN versus U(IV)-NC coordination in tris(silylamide) complexes. Inorg Chem 2015; 54:2474-90. [PMID: 25686295 DOI: 10.1021/acs.inorgchem.5b00034] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Treatment of the metallacycle [UN*2(N,C)] [N* = N(SiMe3)2; N,C = CH2SiMe2N(SiMe3)] with [HNEt3][BPh4], [HNEt3]Cl, and [pyH][OTf] (OTf = OSO2CF3) gave the cationic compound [UN*3][BPh4] (1) and the neutral complexes [UN*3X] [X = Cl (3), OTf (4)], respectively. The dinuclear complex [{UN*(μ-N,C)(μ-OTf)}2] (5) and its tetrahydrofuran (THF) adduct [{UN*(N,C)(THF)(μ-OTf)}2] (6) were obtained by thermal decomposition of 4. The successive addition of NEt4CN or KCN to 1 led to the formation of the cyanido-bridged dinuclear compound [(UN*3)2(μ-CN)][BPh4] (7) and the mononuclear mono- and bis(cyanide) complexes [UN*3(CN)] (2) and [M][UN*3(CN)2] [M = NEt4 (8), K(THF)4 (9)], while crystals of [K(18-crown-6)][UN*3(CN)2] (10) were obtained by the oxidation of [K(18-crown-6)][UN*3(CN)] with pyridine N-oxide. The THF adduct of 1, [UN*3(THF)][BPh4], and complexes 2-7, 9 and 10 were characterized by their X-ray crystal structure. In contrast to their U(III) analogues [NMe4][UN*3(CN)] and [K(18-crown-6)]2[UN*3(CN)2] in which the CN anions are coordinated to the metal center via the C atom, complexes 2 and 9 exhibit the isocyanide U-NC coordination mode of the cyanide ligand. This U(III)/U(IV) differentiation has been analyzed using density functional theory calculations. The observed preferential coordinations are well explained considering the electronic structures of the different species and metal-ligand bonding energies. A comparison of the different quantum descriptors, i.e., bond orders, NPA/QTAIM data, and energy decomposition analysis, has allowed highlighting of the subtle balance between covalent, ionic, and steric factors that govern the U-CN/NC bonding.
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Affiliation(s)
- Alexandre Hervé
- CEA, IRAMIS, UMR 3685 NIMBE, CEA/CNRS NIMBE, CEA/Saclay , 91191 Gif-sur-Yvette, France
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30
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31
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Arnold PL, Stevens CJ, Farnaby JH, Gardiner MG, Nichol GS, Love JB. New Chemistry from an Old Reagent: Mono- and Dinuclear Macrocyclic Uranium(III) Complexes from [U(BH4)3(THF)2]. J Am Chem Soc 2014; 136:10218-21. [DOI: 10.1021/ja504835a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Polly L. Arnold
- EaStCHEM
School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JJ, U. K
| | - Charlotte J. Stevens
- EaStCHEM
School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JJ, U. K
| | - Joy H. Farnaby
- EaStCHEM
School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JJ, U. K
| | - Michael G. Gardiner
- School
of Physical Sciences (Chemistry), University of Tasmania, Private
Bag 75, Hobart, Tasmania 7001, Australia
| | - Gary S. Nichol
- EaStCHEM
School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JJ, U. K
| | - Jason B. Love
- EaStCHEM
School of Chemistry, University of Edinburgh, The King’s Buildings, Edinburgh EH9 3JJ, U. K
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32
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Hervé A, Bouzidi Y, Berthet JC, Belkhiri L, Thuéry P, Boucekkine A, Ephritikhine M. U–CN versus Ce–NC Coordination in Trivalent Complexes Derived from M[N(SiMe3)2]3 (M = Ce, U). Inorg Chem 2014; 53:6995-7013. [DOI: 10.1021/ic500939t] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Alexandre Hervé
- CEA, IRAMIS, NIMBE, UMR 3299 CEA/CNRS SIS2M, CEA/Saclay, Bat 125, 91191 Gif-sur-Yvette, France
| | - Yamina Bouzidi
- URCHEMS,
Département de Chimie, Université Constantine 1, 25000 Constantine, Algeria
| | - Jean-Claude Berthet
- CEA, IRAMIS, NIMBE, UMR 3299 CEA/CNRS SIS2M, CEA/Saclay, Bat 125, 91191 Gif-sur-Yvette, France
| | - Lotfi Belkhiri
- URCHEMS,
Département de Chimie, Université Constantine 1, 25000 Constantine, Algeria
| | - Pierre Thuéry
- CEA, IRAMIS, NIMBE, UMR 3299 CEA/CNRS SIS2M, CEA/Saclay, Bat 125, 91191 Gif-sur-Yvette, France
| | - Abdou Boucekkine
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Michel Ephritikhine
- CEA, IRAMIS, NIMBE, UMR 3299 CEA/CNRS SIS2M, CEA/Saclay, Bat 125, 91191 Gif-sur-Yvette, France
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33
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Jensen MP, Chiarizia R, Shkrob IA, Ulicki JS, Spindler BD, Murphy DJ, Hossain M, Roca-Sabio A, Platas-Iglesias C, de Blas A, Rodríguez-Blas T. Aqueous Complexes for Efficient Size-based Separation of Americium from Curium. Inorg Chem 2014; 53:6003-12. [DOI: 10.1021/ic500244p] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Mark P. Jensen
- Chemical Sciences
and Engineering Division, Argonne National Laboratory, 9700 S. Cass
Ave., Argonne, Illinois 60439, United States
| | - Renato Chiarizia
- Chemical Sciences
and Engineering Division, Argonne National Laboratory, 9700 S. Cass
Ave., Argonne, Illinois 60439, United States
| | - Ilya A. Shkrob
- Chemical Sciences
and Engineering Division, Argonne National Laboratory, 9700 S. Cass
Ave., Argonne, Illinois 60439, United States
| | - Joseph S. Ulicki
- Department of Chemistry and Biochemistry, University of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Brian D. Spindler
- Department of Chemistry and Biochemistry, University of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Daniel J. Murphy
- Department of Chemistry and Biochemistry, University of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Mahmun Hossain
- Department of Chemistry and Biochemistry, University of Wisconsin—Milwaukee, Milwaukee, Wisconsin 53201, United States
| | - Adrián Roca-Sabio
- Departamento
de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Rúa da Fraga no. 10, 15008 A Coruña, Spain
| | - Carlos Platas-Iglesias
- Departamento
de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Rúa da Fraga no. 10, 15008 A Coruña, Spain
| | - Andrés de Blas
- Departamento
de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Rúa da Fraga no. 10, 15008 A Coruña, Spain
| | - Teresa Rodríguez-Blas
- Departamento
de Química Fundamental, Universidade da Coruña, Campus da Zapateira, Rúa da Fraga no. 10, 15008 A Coruña, Spain
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34
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Zaiter A, Amine B, Bouzidi Y, Belkhiri L, Boucekkine A, Ephritikhine M. Selectivity of Azine Ligands Toward Lanthanide(III)/Actinide(III) Differentiation: A Relativistic DFT Based Rationalization. Inorg Chem 2014; 53:4687-97. [DOI: 10.1021/ic500361b] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Abdellah Zaiter
- URCHEMS, Université Constantine 1 (ex. Mentouri), route
de Ain El Bey, 25017 Constantine, Algeria
| | - Boudersa Amine
- URCHEMS, Université Constantine 1 (ex. Mentouri), route
de Ain El Bey, 25017 Constantine, Algeria
| | - Yamina Bouzidi
- URCHEMS, Université Constantine 1 (ex. Mentouri), route
de Ain El Bey, 25017 Constantine, Algeria
| | - Lotfi Belkhiri
- URCHEMS, Université Constantine 1 (ex. Mentouri), route
de Ain El Bey, 25017 Constantine, Algeria
| | - Abdou Boucekkine
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de
Beaulieu, 35042 Rennes Cedex, France
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35
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Yin H, Robinson JR, Carroll PJ, Walsh PJ, Schelter EJ. κ2-Coordination of 18-crown-6 to Ce(iii) cations: solution dynamics and reactivity. Chem Commun (Camb) 2014; 50:3470-2. [DOI: 10.1039/c4cc00448e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Jones MB, Gaunt AJ, Gordon JC, Kaltsoyannis N, Neu MP, Scott BL. Uncovering f-element bonding differences and electronic structure in a series of 1 : 3 and 1 : 4 complexes with a diselenophosphinate ligand. Chem Sci 2013. [DOI: 10.1039/c2sc21806b] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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37
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Jones MB, Gaunt AJ. Recent developments in synthesis and structural chemistry of nonaqueous actinide complexes. Chem Rev 2012; 113:1137-98. [PMID: 23130707 DOI: 10.1021/cr300198m] [Citation(s) in RCA: 262] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthew B Jones
- Inorganic, Isotope, and Actinide Group, Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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38
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Kaltsoyannis N. Does covalency increase or decrease across the actinide series? Implications for minor actinide partitioning. Inorg Chem 2012; 52:3407-13. [PMID: 22668004 DOI: 10.1021/ic3006025] [Citation(s) in RCA: 274] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A covalent chemical bond carries the connotation of overlap of atomic orbitals between bonded atoms, leading to a buildup of the electron density in the internuclear region. Stabilization of the valence 5f orbitals as the actinide series is crossed leads, in compounds of the minor actinides americium and curium, to their becoming approximately degenerate with the highest occupied ligand levels and hence to the unusual situation in which the resultant valence molecular orbitals have significant contributions from both actinide and the ligand yet in which there is little atomic orbital overlap. In such cases, the traditional quantum-chemical tools for assessing the covalency, e.g., population analysis and spin densities, predict significant metal-ligand covalency, although whether this orbital mixing is really covalency in the generally accepted chemical view is an interesting question. This review discusses our recent analyses of the bonding in AnCp3 and AnCp4 (An = Th-Cm; Cp = η(5)-C5H5) using both the traditional tools and also topological analysis of the electron density via the quantum theory of atoms-in-molecules. I will show that the two approaches yield rather different conclusions and suggest that care must be taken when using quantum chemistry to assess metal-ligand covalency in this part of the periodic table. The implications of this work for minor actinide partitioning from nuclear wastes are discussed; minor actinide extractant ligands based on nitrogen donors have received much attention in recent years, as have comparisons of the extent of covalency in actinide-nitrogen bonding with that in analogous lanthanide systems via quantum-chemical studies employing the traditional tools for assessing the covalency.
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Affiliation(s)
- Nikolas Kaltsoyannis
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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39
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Levason W, Reid G. Hetero-Crown Ethers-Synthesis and Metal-Binding Properties of Macrocyclic Ligands Bearing Group 16 (S, Se, Te) Donor Atoms. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Seaman LA, Wu G, Edelstein N, Lukens WW, Magnani N, Hayton TW. Probing the 5f orbital contribution to the bonding in a U(V) ketimide complex. J Am Chem Soc 2012; 134:4931-40. [PMID: 22324788 DOI: 10.1021/ja211875s] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reaction of UCl(4) with 5 equiv of Li(N═C(t)BuPh) generates the homoleptic U(IV) ketimide complex [Li(THF)(2)][U(N═C(t)BuPh)(5)] (1) in 71% yield. Similarly, reaction of UCl(4) with 5 equiv of Li(N═C(t)Bu(2)) affords [Li(THF)][U(N═C(t)Bu(2))(5)] (2) in 67% yield. Oxidation of 2 with 0.5 equiv of I(2) results in the formation of the neutral U(V) complex U(N═C(t)Bu(2))(5) (3). In contrast, oxidation of 1 with 0.5 equiv of I(2), followed by addition of 1 equiv of Li(N═C(t)BuPh), generates the octahedral U(V) ketimide complex [Li][U(N═C(t)BuPh)(6)] (4) in 68% yield. Complex 4 can be further oxidized to the U(VI) ketimide complex U(N═C(t)BuPh)(6) (5). Complexes 1-5 were characterized by X-ray crystallography, while SQUID magnetometry, EPR spectroscopy, and UV-vis-NIR spectroscopy measurements were also preformed on complex 4. Using this data, the crystal field splitting parameters of the f orbitals were determined, allowing us to estimate the amount of f orbital participation in the bonding of 4.
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Affiliation(s)
- Lani A Seaman
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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41
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Vidjayacoumar B, Ilango S, Ray MJ, Chu T, Kolpin KB, Andreychuk NR, Cruz CA, Emslie DJH, Jenkins HA, Britten JF. Rigid NON- and NSN-ligand complexes of tetravalent and trivalent uranium: comparison of U–OAr2 and U–SAr2 bonding. Dalton Trans 2012; 41:8175-89. [DOI: 10.1039/c2dt30247k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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42
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Li W, Xue M, Tu J, Zhang Y, Shen Q. Syntheses and structures of lanthanide borohydrides supported by a bridged bis(amidinate) ligand and their high activity for controlled polymerization of ε-caprolactone, l-lactide and rac-lactide. Dalton Trans 2012; 41:7258-65. [DOI: 10.1039/c2dt30096f] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Wenbo Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
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43
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Cushion MG, Mountford P. Cationic and charge-neutral calcium tetrahydroborate complexes and their use in the controlled ring-opening polymerisation of rac-lactide. Chem Commun (Camb) 2011; 47:2276-8. [DOI: 10.1039/c0cc04348f] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Zhizhin KY, Mal’tseva NN, Bykov AY, Kuznetsov NT. Modern aspects of the chemistry of complex boron and aluminum hydrides. RUSS J INORG CHEM+ 2010. [DOI: 10.1134/s0036023610140020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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45
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Arnold PL, Turner ZR, Kaltsoyannis N, Pelekanaki P, Bellabarba RM, Tooze RP. Covalency in Ce(IV) and U(IV) halide and N-heterocyclic carbene bonds. Chemistry 2010; 16:9623-9. [PMID: 20658507 DOI: 10.1002/chem.201001471] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Oxidative halogenation with trityl chloride provides convenient access to Ce(IV) and U(IV) chloroamides [M(N{SiMe(3)}(2))(3)Cl] and their N-heterocyclic carbene derivatives, [M(L)(N{SiMe(3)}(2))(2)Cl] (L = OCMe(2)CH(2)(CNCH(2)CH(2)NDipp) Dipp = 2,6-iPr(2)C(6)H(3)). Computational analysis of the bonding in these and a fluoro analogue, [U(L)(N{SiMe(3)}(2))(2)F], provides new information on the covalency in this relative rare oxidation state for molecular cerium complexes. Computational studies reveal increased Mayer bond orders in the actinide carbene bond compared with the lanthanide carbene bond, and natural and atoms-in-molecules analyses suggest greater overall ionicity in the cerium complexes than in the uranium analogues.
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Affiliation(s)
- Polly L Arnold
- School of Chemistry, Joseph Black Building, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, UK.
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46
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Sirsch P, Clark NLN, Onuţ L, Burchell RPL, Decken A, McGrady GS, Daoud-Aladine A, Gutmann MJ. Insights into Metal Borohydride and Aluminohydride Bonding: X-Ray and Neutron Diffraction Structures and a DFT and Charge Density Study of [Na(15-crown-5)][EH4] (E = B, Al). Inorg Chem 2010; 49:11395-402. [DOI: 10.1021/ic1014187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Sirsch
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - Natascha L. N. Clark
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - Lenuţa Onuţ
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - Richard P. L. Burchell
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - Andreas Decken
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - G. Sean McGrady
- Department of Chemistry, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 5A3
| | - Aziz Daoud-Aladine
- ISIS Neutron Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
| | - Matthias J. Gutmann
- ISIS Neutron Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
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47
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Daly SR, Girolami GS. Synthesis, Characterization, and Structures of Uranium(III) N,N-Dimethylaminodiboranates. Inorg Chem 2010; 49:5157-66. [DOI: 10.1021/ic100290j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott R. Daly
- The School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
| | - Gregory S. Girolami
- The School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801
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48
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Schelter EJ, Wu R, Veauthier JM, Bauer ED, Booth CH, Thomson RK, Graves CR, John KD, Scott BL, Thompson JD, Morris DE, Kiplinger JL. Comparative study of f-element electronic structure across a series of multimetallic actinide and lanthanoid-actinide complexes possessing redox-active bridging ligands. Inorg Chem 2010; 49:1995-2007. [PMID: 20088535 DOI: 10.1021/ic9024475] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A comparative examination of the electronic interactions across a series of trimetallic actinide and mixed lanthanide-actinide and lanthanum-actinide complexes is presented. Using reduced, radical terpyridyl ligands as conduits in a bridging framework to promote intramolecular metal-metal communication, studies containing structural, electrochemical, and X-ray absorption spectroscopy are reported for (C(5)Me(5))(2)An[-N horizontal lineC(Bn)(tpy-M{C(5)Me(4)R}(2))](2) (where An = Th(IV), U(IV); Bn = CH(2)C(6)H(5); M = La(III), Sm(III), Yb(III), U(III); R = H, Me, Et) to reveal effects dependent on the identities of the metal ions and R-groups. The electrochemical results show differences in redox energetics at the peripheral "M" site between complexes and significant wave splitting of the metal- and ligand-based processes indicating substantial electronic interactions between multiple redox sites across the actinide-containing bridge. Most striking is the appearance of strong electronic coupling for the trimetallic Yb(III)-U(IV)-Yb(III), Sm(III)-U(IV)-Sm(III), and La(III)-U(IV)-La(III) complexes, [8](-), [9b](-), and [10b](-), respectively, whose calculated comproportionation constant K(c) is slightly larger than that reported for the benchmark Creutz-Taube ion. X-ray absorption studies for monometallic metallocene complexes of U(III), U(IV), and U(V) reveal small but detectable energy differences in the "white-line" feature of the uranium L(III)-edges consistent with these variations in nominal oxidation state. The sum of these data provides evidence of 5f/6d-orbital participation in bonding and electronic delocalization in these multimetallic f-element complexes. An improved, high-yielding synthesis of 4'-cyano-2,2':6',2''-terpyridine is also reported.
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Affiliation(s)
- Eric J Schelter
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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49
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Michelini MDC, Marçalo J, Russo N, Gibson JK. Gas-Phase Reactions of Uranate Ions, UO2−, UO3−, UO4−, and UO4H−, with Methanol: a Convergence of Experiment and Theory. Inorg Chem 2010; 49:3836-50. [DOI: 10.1021/ic902550g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Maria del Carmen Michelini
- Dipartimento di Chimica, Università della Calabria, Via P. Bucci, Cubo 14 C, 87030 Arcavacata di Rende, Italy
| | - Joaquim Marçalo
- Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal
| | - Nino Russo
- Dipartimento di Chimica, Università della Calabria, Via P. Bucci, Cubo 14 C, 87030 Arcavacata di Rende, Italy
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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50
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Evans WJ, Mueller TJ, Ziller JW. Lanthanide versus actinide reactivity in the formation of sterically crowded [(C(5)Me(5))(3)ML(n)] nitrile and isocyanide complexes. Chemistry 2010; 16:964-75. [PMID: 19946904 DOI: 10.1002/chem.200901990] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The limits of steric crowding in organometallic metallocene complexes have been examined by studying the synthesis of [(C(5)Me(5))(3)ML(n)] complexes as a function of metal in which L=Me(3)CCN, Me(3)CNC, and Me(3)SiCN. The bis(tert-butyl nitrile) complexes [(C(5)Me(5))(3)Ln(NCCMe(3))(2)] (Ln=La, 1; Ce, 2; Pr, 3) can be isolated with the largest lanthanide metal ions, La(3+), Ce(3+), and Pr(3+). The Pr(3+) ion also forms an isolable mono-nitrile complex, [(C(5)Me(5))(3)Pr(NCCMe(3))] (4), whereas for Nd(3+) only the mono-adduct [(C(5)Me(5))(3)Nd(NCCMe(3))] (5) was observed. With smaller metal ions, Sm(3+) and Y(3+), insertion of Me(3)CCN into the M--C(C(5)Me(5)) bond was observed to form the cyclopentadiene-substituted ketimide complexes [(C(5)Me(5))(2)Ln{NC(C(5)Me(5))(CMe(3))}(NCCMe(3))] (Ln=Sm, 6; Y, 7). With tert-butyl isocyanide ligands, a bis-isocyanide product can be isolated with lanthanum, [(C(5)Me(5))(3)La(CNCMe(3))(2)] (8), and a mono-isocyanide product with neodymium, [(C(5)Me(5))(3)Nd(CNCMe(3))] (9). Silicon-carbon bond cleavage was observed in reactions between [(C(5)Me(5))(3)Ln] complexes and trimethylsilyl cyanide, Me(3)SiCN, to produce the trimeric cyanide complexes [{(C(5)Me(5))(2)Ln(mu-CN)(NCSiMe(3))}(3)] (Ln=La, 10; Pr, 11). With uranium, a mono-nitrile reaction product, [(C(5)Me(5))(3)U(NCCMe(3))] (12), which is analogous to 5, was obtained from the reaction between [(C(5)Me(5))(3)U] and Me(3)CCN, but [(C(5)Me(5))(3)U] reacts with Me(3)CNC through C--N bond cleavage to form a trimeric cyanide complex, [{(C(5)Me(5))(2)U(mu-CN)(CNCMe(3))}(3)] (13).
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Affiliation(s)
- William J Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA.
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