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Ordoñez O, Yu X, Wu G, Autschbach J, Hayton TW. Synthesis and Characterization of Two Uranyl-Aryl "Ate" Complexes. Chemistry 2021; 27:5885-5889. [PMID: 33270947 DOI: 10.1002/chem.202005078] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 11/10/2022]
Abstract
Reaction of [UO2 Cl2 (THF)3 ] with 3 equivalents of LiC6 Cl5 in Et2 O resulted in the formation of first uranyl aryl complex [Li(Et2 O)2 (THF)][UO2 (C6 Cl5 )3 ] ([Li][1]) in good yields. Subsequent dissolution of [Li][1] in THF resulted in conversion into [Li(THF)4 ][UO2 (C6 Cl5 )3 (THF)] ([Li][2]), also in good yields. DFT calculations reveal that the U-C bonds in [Li][1] and [Li][2] exhibit appreciable covalency. Additionally, the 13 C NMR chemical shifts for their Cipso environments are strongly affected by spin-orbit coupling-a consequence of 5f orbital participation in the U-C bonds.
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Affiliation(s)
- Osvaldo Ordoñez
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260, USA
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260, USA
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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2
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Vícha J, Švec P, Růžičková Z, Samsonov MA, Bártová K, Růžička A, Straka M, Dračínský M. Experimental and Theoretical Evidence of Spin‐Orbit Heavy Atom on the Light Atom
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H NMR Chemical Shifts Induced through H⋅⋅⋅I
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Hydrogen Bond. Chemistry 2020; 26:8698-8702. [DOI: 10.1002/chem.202001532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Jan Vícha
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
- Centre of Polymer SystemsTomas Bata University in Zlín Tomáše Bati 5678 Zlín 760 01 Czech Republic
| | - Petr Švec
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Maksim A. Samsonov
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Kateřina Bártová
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic ChemistryUniversity of Pardubice Studentská 573 Pardubice 53210 Czech Republic
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry, AS CR Flemingovo nám. 2 Prague 16610 Czech Republic
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3
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Rocchigiani L, Klooster WT, Coles SJ, Hughes DL, Hrobárik P, Bochmann M. Hydride Transfer to Gold: Yes or No? Exploring the Unexpected Versatility of Au⋅⋅⋅H−M Bonding in Heterobimetallic Dihydrides. Chemistry 2020; 26:8267-8280. [DOI: 10.1002/chem.202000016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Luca Rocchigiani
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Wim T. Klooster
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - Simon J. Coles
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - David L. Hughes
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Peter Hrobárik
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University 84215 Bratislava Slovakia
| | - Manfred Bochmann
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
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4
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Greif AH, Hrobárik P, Kaupp M. Insights into trans-Ligand and Spin-Orbit Effects on Electronic Structure and Ligand NMR Shifts in Transition-Metal Complexes. Chemistry 2017; 23:9790-9803. [PMID: 28338246 DOI: 10.1002/chem.201700844] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Indexed: 11/05/2022]
Abstract
Surprisingly general effects of trans ligands L on the ligand NMR shifts in third-row transition-metal complexes have been found by quasi-relativistic computations, encompassing 5d10 , 5d8 , and to some extent even 5d6 situations. Closer analysis, with emphasis on 1 H shieldings in a series of linear HAuI Lq complexes, reveals a dominance of spin-orbit (SO) effects, which can change sign from appreciably shielding for weak trans ligands to appreciably deshielding for ligands with strong trans influence. This may be traced back to increasing destabilization of a σ-type MO at scalar relativistic level, which translates into very different σ-/π-mixing if SO coupling is included. For the strongest trans ligands, the σ-MO may move above the highest occupied π-type MOs, thereby dramatically reducing strongly shielding contributions from predominantly π-type spinors. The effects of SO-mixing are in turn related to angular momentum admixture from atomic spinors at the metal center. These SO-induced trends hold for other nuclei and may also be used to qualitatively predict shifts in unknown complexes.
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Affiliation(s)
- Anja H Greif
- Technische Universität Berlin, Institut für Chemie, Theoretische Chemie/Quantenchemie, Sekr. C7, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Peter Hrobárik
- Technische Universität Berlin, Institut für Chemie, Theoretische Chemie/Quantenchemie, Sekr. C7, Strasse des 17. Juni 135, 10623, Berlin, Germany.,Faculty of Natural Sciences, Comenius University, Department of Inorganic Chemistry, Mlynská dolina CH-2, 84215, Bratislava, Slovakia
| | - Martin Kaupp
- Technische Universität Berlin, Institut für Chemie, Theoretische Chemie/Quantenchemie, Sekr. C7, Strasse des 17. Juni 135, 10623, Berlin, Germany
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5
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Bühl M, Ashbrook SE, Dawson DM, Doyle RA, Hrobárik P, Kaupp M, Smellie IA. Paramagnetic NMR of Phenolic Oxime Copper Complexes: A Joint Experimental and Density Functional Study. Chemistry 2016; 22:15328-15339. [DOI: 10.1002/chem.201602567] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Michael Bühl
- University of St. Andrews; School of Chemistry and Centre of Magnetic Resonance, North Haugh; St Andrews, Fife KY16 9ST Scotland UK
| | - Sharon E. Ashbrook
- University of St. Andrews; School of Chemistry and Centre of Magnetic Resonance, North Haugh; St Andrews, Fife KY16 9ST Scotland UK
| | - Daniel M. Dawson
- University of St. Andrews; School of Chemistry and Centre of Magnetic Resonance, North Haugh; St Andrews, Fife KY16 9ST Scotland UK
| | - Rachel A. Doyle
- University of St. Andrews; School of Chemistry and Centre of Magnetic Resonance, North Haugh; St Andrews, Fife KY16 9ST Scotland UK
| | - Peter Hrobárik
- Technische Universität Berlin; Institut für Chemie; Strasse des 17. Juni 135 D-10623 Berlin Germany
| | - Martin Kaupp
- Technische Universität Berlin; Institut für Chemie; Strasse des 17. Juni 135 D-10623 Berlin Germany
| | - Iain A. Smellie
- University of St. Andrews; School of Chemistry and Centre of Magnetic Resonance, North Haugh; St Andrews, Fife KY16 9ST Scotland UK
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Adam C, Beele BB, Geist A, Müllich U, Kaden P, Panak PJ. NMR and TRLFS studies of Ln(iii) and An(iii) C5-BPP complexes. Chem Sci 2015; 6:1548-1561. [PMID: 29560242 PMCID: PMC5811079 DOI: 10.1039/c4sc03103b] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 12/09/2014] [Indexed: 11/21/2022] Open
Abstract
C5-BPP is a highly efficient N-donor ligand for the separation of trivalent actinides, An(iii), from trivalent lanthanides, Ln(iii). The molecular origin of the selectivity of C5-BPP and many other N-donor ligands of the BTP-type is still not entirely understood. We present here the first NMR studies on C5-BPP Ln(iii) and An(iii) complexes. C5-BPP is synthesized with 10% 15N labeling and characterized by NMR and LIFDI-MS methods. 15N NMR spectroscopy gives a detailed insight into the bonding of C5-BPP with lanthanides and Am(iii) as a representative for trivalent actinide cations, revealing significant differences in 15N chemical shift for coordinating nitrogen atoms compared to Ln(iii) complexes. The temperature dependence of NMR chemical shifts observed for the Am(iii) complex indicates a weak paramagnetism. This as well as the observed large chemical shift for coordinating nitrogen atoms show that metal-ligand bonding in Am(C5-BPP)3 has a larger share of covalence than in lanthanide complexes, confirming earlier studies. The Am(C5-BPP)3 NMR sample is furthermore spiked with Cm(iii) and characterized by time-resolved laser fluorescence spectroscopy (TRLFS), yielding important information on the speciation of trace amounts of minor complex species.
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Affiliation(s)
- Christian Adam
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
- University of Heidelberg , Institute of Physical Chemistry , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Björn B Beele
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
- University of Heidelberg , Institute of Physical Chemistry , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
| | - Udo Müllich
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
| | - Peter Kaden
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
| | - Petra J Panak
- Karlsruhe Institute of Technology (KIT) , Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640 , 76021 Karlsruhe , Germany .
- University of Heidelberg , Institute of Physical Chemistry , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
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Alam TM, Liao Z, Zakharov LN, Nyman M. Solid-state dynamics of uranyl polyoxometalates. Chemistry 2014; 20:8302-7. [PMID: 24889825 DOI: 10.1002/chem.201402351] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 01/06/2023]
Abstract
Understanding fundamental uranyl polyoxometalate (POM) chemistry in solution and the solid state is the first step to defining its future role in the development of new actinide materials and separation processes that are vital to every step of the nuclear fuel cycle. Many solid-state geometries of uranyl POMs have been described, but we are only beginning to understand their chemical behavior, which thus far includes the role of templates in their self-assembly, and the dynamics of encapsulated species in solution. This study provides unprecedented detail into the exchange dynamics of the encapsulated species in the solid state through Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) spectroscopy. Although it was previously recognized that capsule-like molybdate and uranyl POMs exchange encapsulated species when dissolved in water, analogous exchange in the solid state has not been documented, or even considered. Here, we observe the extremely high rate of transport of Li(+) and aqua species across the uranyl shell in the solid state, a process that is affected by both temperature and pore blocking by larger species. These results highlight the untapped potential of emergent f-block element materials and vesicle-like POMs.
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Affiliation(s)
- Todd M Alam
- Department of Electronic, Optical and Nanostructured Materials, Sandia National Laboratories, Albuquerque, NM 87185 (USA).
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8
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Seaman LA, Pedrick EA, Tsuchiya T, Wu G, Jakubikova E, Hayton TW. Comparison of the Reactivity of 2-Li-C6H4CH2NMe2with MCl4(M=Th, U): Isolation of a Thorium Aryl Complex or a Uranium Benzyne Complex. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303992] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Seaman LA, Pedrick EA, Tsuchiya T, Wu G, Jakubikova E, Hayton TW. Comparison of the reactivity of 2-Li-C6H4CH2NMe2 with MCl4 (M=Th, U): isolation of a thorium aryl complex or a uranium benzyne complex. Angew Chem Int Ed Engl 2013; 52:10589-92. [PMID: 23943560 DOI: 10.1002/anie.201303992] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 06/27/2013] [Indexed: 11/08/2022]
Abstract
Why do U react like that? Reaction of 2-Li-C6H4CH2NMe2 with [MCl4(DME)n] (M=Th, n=2; M=U, n=0) results in the formation of a thorium aryl complex, [Th(2-C6H4CH2NMe2)4] or a uranium benzyne complex, [Li][U(2,3-C6H3CH2NMe2)(2-C6H4CH2NMe2)3]. A DFT analysis suggests that the formation of a benzyne complex with U but not with Th is a kinetic and not thermodynamic effect.
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Affiliation(s)
- Lani A Seaman
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA 93106 (USA)
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Seaman LA, Hrobárik P, Schettini MF, Fortier S, Kaupp M, Hayton TW. A Rare Uranyl(VI)-Alkyl Ate Complex [Li(DME)1.5]2[UO2(CH2SiMe3)4] and Its Comparison with a Homoleptic Uranium(VI)-Hexaalkyl. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209611] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Seaman LA, Hrobárik P, Schettini MF, Fortier S, Kaupp M, Hayton TW. A rare uranyl(VI)-alkyl ate complex [Li(DME)1.5]2[UO2(CH2SiMe3)4] and its comparison with a homoleptic uranium(VI)-hexaalkyl. Angew Chem Int Ed Engl 2013; 52:3259-63. [PMID: 23404960 DOI: 10.1002/anie.201209611] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Lani A Seaman
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA 93106, USA
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