1
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Errulat D, Harriman KLM, Gálico DA, Kitos AA, Mansikkamäki A, Murugesu M. A trivalent 4f complex with two bis-silylamide ligands displaying slow magnetic relaxation. Nat Chem 2023:10.1038/s41557-023-01208-y. [PMID: 37231297 DOI: 10.1038/s41557-023-01208-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 04/17/2023] [Indexed: 05/27/2023]
Abstract
The best-performing single-molecule magnets (SMMs) have historically relied on pseudoaxial ligands delocalized across several coordinated atoms. This coordination environment has been found to elicit strong magnetic anisotropy, but lanthanide-based SMMs with low coordination numbers have remained synthetically elusive species. Here we report a cationic 4f complex bearing only two bis-silylamide ligands, Yb(III)[{N(SiMePh2)2}2][Al{OC(CF3)3}4], which exhibits slow relaxation of its magnetization. The combination of the bulky silylamide ligands and weakly coordinating [Al{OC(CF3)3}4]- anion provides a sterically hindered environment that suitably stabilizes the pseudotrigonal geometry necessary to elicit strong ground-state magnetic anisotropy. The resolution of the mJ states by luminescence spectroscopy is supported by ab initio calculations, which show a large ground-state splitting of approximately 1,850 cm-1. These results provide a facile route to access a bis-silylamido Yb(III) complex, and further underline the desirability of axially coordinated ligands with well-localized charges for high-performing SMMs.
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Affiliation(s)
- Dylan Errulat
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Katie L M Harriman
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Diogo A Gálico
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Alexandros A Kitos
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada.
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2
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Eisenstein O. From the Felkin‐Anh Rule to the Grignard Reaction: an Almost Circular 50 Year Adventure in the World of Molecular Structures and Reaction Mechanisms with Computational Chemistry**. Isr J Chem 2022. [DOI: 10.1002/ijch.202100138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Odile Eisenstein
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34095 France Department of Chemistry and Hylleraas Centre for Quantum Molecular Sciences University of Oslo Oslo 0315 Norway
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3
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Okokhere-Edeghoghon B, Neale SE, Hill MS, Mahon MF, McMullin CL. Isocyanate deoxygenation by a molecular magnesium silanide. Dalton Trans 2021; 51:136-144. [PMID: 34866137 DOI: 10.1039/d1dt03775g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stoichiometric reactivity of a β-diketiminato (BDI) magnesium silanide towards a variety of organic isocyanates has been assessed. While the primary outcome of reactions of t-BuNCO, DippNCO and CyNCO was the production of β-diketiminato magnesium siloxide adducts of the isonitrile resulting from isocyanate deoxygenation, analogous treatment with i-PrNCO led to multiple products, four of which have been positively identified. Although the specificity of this latter reaction was hampered by competitive isocycanate addition at the γ-methine carbon of the BDI supporting ligand, the identification of [{i-PrNCO}CH{(Me)CNDipp}Mg{Me2PhSi}C(O)Ni-Pr]6 provided corroborative evidence for the likely generation of sila-amidate intermediates in all four reactions under study. The formation of [{Me2PhSi}C(O)NR]- anions as the most likely initial species formed en route to isonitrile and siloxide formation was, therefore, validated by a computational density functional theory (DFT) study.
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Affiliation(s)
| | - Samuel E Neale
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Claire L McMullin
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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4
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Nonconventional C–H···Cu Interaction Between Copper Cun Clusters (n = 3–20) and Aromatic Compounds. J CLUST SCI 2021. [DOI: 10.1007/s10876-020-01873-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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González‐Montiel S, Ignacio Sandoval‐Chávez C, Castillo‐Moreno MÁ, Mendoza‐Espinosa D, Manuel Vásquez‐Pérez J, Cruz‐Borbolla J, Salazar‐Pereda V. Coordination from Heteroscorpionate Ligand Towards Pd(II) via Pd⋅⋅⋅Hδ−C(sp3) Interaction: Structural and Catalytic Studies. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Simplicio González‐Montiel
- Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C.P. 42184, Mineral de la Reforma Hidalgo México
| | - César Ignacio Sandoval‐Chávez
- CONACYT Research-Fellow, Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C. P. 42184, Mineral de la Reforma Hidalgo México
| | - Miguel Ángel Castillo‐Moreno
- Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C.P. 42184, Mineral de la Reforma Hidalgo México
| | - Daniel Mendoza‐Espinosa
- Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C.P. 42184, Mineral de la Reforma Hidalgo México
| | - José Manuel Vásquez‐Pérez
- CONACYT Research-Fellow, Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C. P. 42184, Mineral de la Reforma Hidalgo México
| | - Julián Cruz‐Borbolla
- Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C.P. 42184, Mineral de la Reforma Hidalgo México
| | - Verónica Salazar‐Pereda
- Área Académica de Química, Centro de Investigaciones Químicas Universidad Autónoma del Estado de Hidalgo km. 14.5 Carretera Pachuca-Tulancingo, Ciudad del Conocimiento C.P. 42184, Mineral de la Reforma Hidalgo México
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6
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Boteju KC, Venkatesh A, Chu YY, Wan S, Ellern A, Rossini AJ, Sadow AD. Ancillary Steric Effects on the Activation of SiH Bonds in Arylsilazido Rare-Earth Compounds. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kasuni C. Boteju
- US Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Amrit Venkatesh
- US Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Yang-Yun Chu
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Suchen Wan
- US Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States
| | - Arkady Ellern
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Aaron J. Rossini
- US Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
| | - Aaron D. Sadow
- US Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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7
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Kennedy CR, Joannou MV, Steves JE, Hoyt JM, Kovel CB, Chirik PJ. Iron-Catalyzed Vinylsilane Dimerization and Cross-Cycloadditions with 1,3-Dienes: Probing the Origins of Chemo- and Regioselectivity. ACS Catal 2021; 11:1368-1379. [PMID: 34336370 PMCID: PMC8317497 DOI: 10.1021/acscatal.0c04608] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The selective, intermolecular, homodimerization and cross-cycloaddition of vinylsilanes with unbiased 1,3-dienes, catalyzed by a pyridine-2,6-diimine (PDI) iron complex is described. In the absence of a diene coupling partner, vinylsilane hydroalkenylation products were obtained chemoselectively with unusual head-to-head regioselectivity (up to >98% purity, 98:2 E/Z). In the presence of a 4- or 2-substituted diene coupling partner, under otherwise identical reaction conditions, formation of value-added [2+2]- and [4+2]-cycloadducts, respectively, was observed. The chemoselectivity profile was distinct from that observed for analogous α-olefin dimerization and cross-reactions with 1,3-dienes. Mechanistic studies conducted with well-defined, single-component precatalysts (MePDI)Fe(L2) (where MePDI = 2,6-(2,6-Me2-C6H3N═CMe)2C5H3N; L2 = butadiene or 2(N2)) provided insights into the kinetic and thermodynamic factors contributing to the substrate-controlled regioselectivity for both the homodimerization and cross cycloadditions. Diamagnetic iron diene and paramagnetic iron olefin complexes were identified as catalyst resting states, were characterized by in situ NMR and Mössbauer spectroscopic studies, and were corroborated with DFT calculations. Stoichiometric reactions and computational models provided evidence for a common mechanistic regime where competing steric and orbital-symmetry requirements dictate the regioselectivity of oxidative cyclization. Although distinct chemoselectivity profiles were observed in cross-cycloadditions with the vinylsilane congeners of α-olefins, these products arose from metallacycles with the same connectivity. The silyl substituents ultimately governed the relative rates of β-H elimination and C-C reductive elimination to dictate final product formation.
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Affiliation(s)
| | | | | | - Jordan M. Hoyt
- Department of Chemistry, Princeton University, Princeton, NJ 08544
| | - Carli B. Kovel
- Department of Chemistry, Princeton University, Princeton, NJ 08544
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, NJ 08544
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8
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Yang J, Postils V, Lipschutz MI, Fasulo M, Raynaud C, Clot E, Eisenstein O, Tilley TD. Efficient alkene hydrosilation with bis(8-quinolyl)phosphine (NPN) nickel catalysts. The dominant role of silyl-over hydrido-nickel catalytic intermediates. Chem Sci 2020; 11:5043-5051. [PMID: 34122961 PMCID: PMC8159242 DOI: 10.1039/d0sc00997k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 04/23/2020] [Indexed: 12/04/2022] Open
Abstract
A cationic nickel complex of the bis(8-quinolyl)(3,5-di-tert-butylphenoxy)phosphine (NPN) ligand, [(NPN)NiCl]+, is a precursor to efficient catalysts for the hydrosilation of alkenes with a variety of hydrosilanes under mild conditions and low catalyst loadings. DFT studies reveal the presence of two coupled catalytic cycles based on [(NPN)NiH]+ and [(NPN)NiSiR3]+ active species, with the latter being more efficient for producing the product. The preferred silyl-based catalysis is not due to a more facile insertion of alkene into the Ni-Si (vs. Ni-H) bond, but by consistent and efficient conversions of the hydride to the silyl complex.
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Affiliation(s)
- Jian Yang
- Department of Chemistry, University of California Berkeley California 94720 USA
| | - Verònica Postils
- ICGM, Université de Montpellier, CNRS, ENSCM Montpellier France
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona Campus Montilivi Girona 17071 Spain
- Kimika Fakultatea, Euskal Herriko Unibertsitatea PK 1072 Donostia 20080 Spain
| | - Michael I Lipschutz
- Department of Chemistry, University of California Berkeley California 94720 USA
| | - Meg Fasulo
- Department of Chemistry, University of California Berkeley California 94720 USA
| | | | - Eric Clot
- ICGM, Université de Montpellier, CNRS, ENSCM Montpellier France
| | - Odile Eisenstein
- ICGM, Université de Montpellier, CNRS, ENSCM Montpellier France
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo P.O. Box 1033 Blindern Oslo N-0315 Norway
| | - T Don Tilley
- Department of Chemistry, University of California Berkeley California 94720 USA
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9
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Nicholas HM, Vonci M, Goodwin CAP, Loo SW, Murphy SR, Cassim D, Winpenny REP, McInnes EJL, Chilton NF, Mills DP. Electronic structures of bent lanthanide(III) complexes with two N-donor ligands. Chem Sci 2019; 10:10493-10502. [PMID: 32110338 PMCID: PMC7020784 DOI: 10.1039/c9sc03431e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 09/17/2019] [Indexed: 01/19/2023] Open
Abstract
Low coordinate metal complexes can exhibit superlative physicochemical properties, but this chemistry is challenging for the lanthanides (Ln) due to their tendency to maximize electrostatic contacts in predominantly ionic bonding regimes. Although a handful of Ln2+ complexes with only two monodentate ligands have been isolated, examples in the most common +3 oxidation state have remained elusive due to the greater electrostatic forces of Ln3+ ions. Here, we report bent Ln3+ complexes with two bis(silyl)amide ligands; in the solid state the Yb3+ analogue exhibits a crystal field similar to its three coordinate precursor rather than that expected for an axial system. This unanticipated finding is in opposition to the predicted electronic structure for two-coordinate systems, indicating that geometries can be more important than the Ln ion identity for dictating the magnetic ground states of low coordinate complexes; this is crucial transferable information for the construction of systems with enhanced magnetic properties.
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Affiliation(s)
- Hannah M Nicholas
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Michele Vonci
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Conrad A P Goodwin
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Song Wei Loo
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Siobhan R Murphy
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Daniel Cassim
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Richard E P Winpenny
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Eric J L McInnes
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Nicholas F Chilton
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - David P Mills
- Department of Chemistry , School of Natural Sciences , The University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
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10
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Haddow MF, Newland RJ, Tegner BE, Mansell SM. Reversible temperature-induced polymorphic phase transitions of [Y(OAr) 3] and [Ce(OAr) 3] (Ar = 2,6- tBu 2-4-MeC 6H 2): interconversions between pyramidal and planar geometries. CrystEngComm 2019. [DOI: 10.1039/c9ce00184k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Exploring the balance of energetics between planar and pyramidal forms of [Y(O-2,6-tBu2-4-MePh)3] and related complexes.
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Affiliation(s)
- Mairi F. Haddow
- Institute of Chemical Sciences
- Heriot-Watt University
- Edinburgh
- UK
| | | | - Bengt E. Tegner
- Institute of Chemical Sciences
- Heriot-Watt University
- Edinburgh
- UK
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11
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Zhou G, Kang X, Wang X, Hou Z, Luo Y. Theoretical Investigations of Isoprene Polymerization Catalyzed by Cationic Half-Sandwich Scandium Complexes Bearing a Coordinative Side Arm. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00876] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Guangli Zhou
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiaohui Kang
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
- College
of Pharmacy, Dalian Medical University, Dalian, Liaoning 116044, China
| | - Xingbao Wang
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Zhaomin Hou
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
- Organometallic
Chemistry Laboratory and RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yi Luo
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
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12
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Pindwal A, Yan K, Patnaik S, Schmidt BM, Ellern A, Slowing II, Bae C, Sadow AD. Homoleptic Trivalent Tris(alkyl) Rare Earth Compounds. J Am Chem Soc 2017; 139:16862-16874. [PMID: 28991458 DOI: 10.1021/jacs.7b09521] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Homoleptic tris(alkyl) rare earth complexes Ln{C(SiHMe2)3}3 (Ln = La, 1a; Ce, 1b; Pr, 1c; Nd, 1d) are synthesized in high yield from LnI3THFn and 3 equiv of KC(SiHMe2)3. X-ray diffraction studies reveal 1a-d are isostructural, pseudo-C3-symmetric molecules that contain two secondary Ln↼HSi interactions per alkyl ligand (six total). Spectroscopic assignments are supported by comparison with Ln{C(SiDMe2)3}3 and DFT calculations. The Ln↼HSi and terminal SiH exchange rapidly on the NMR time scale at room temperature, but the two motifs are resolved at low temperature. Variable-temperature NMR studies provide activation parameters for the exchange process in 1a (ΔH⧧ = 8.2(4) kcal·mol-1; ΔS⧧ = -1(2) cal·mol-1K-1) and 1a-d9 (ΔH⧧ = 7.7(3) kcal·mol-1; ΔS⧧ = -4(2) cal·mol-1K-1). Comparisons of lineshapes, rate constants (kH/kD), and slopes of ln(k/T) vs 1/T plots for 1a and 1a-d9 reveal that an inverse isotope effect dominates at low temperature. DFT calculations identify four low-energy intermediates containing five β-Si-H⇀Ln and one γ-C-H⇀Ln. The calculations also suggest the pathway for Ln↼HSi/SiH exchange involves rotation of a single C(SiHMe2)3 ligand that is coordinated to the Ln center through the Ln-C bond and one secondary interaction. These robust organometallic compounds persist in solution and in the solid state up to 80 °C, providing potential for their use in a range of synthetic applications. For example, reactions of Ln{C(SiHMe2)3}3 and ancillary proligands, such as bis-1,1-(4,4-dimethyl-2-oxazolinyl)ethane (HMeC(OxMe2)2) give {MeC(OxMe2)2}Ln{C(SiHMe2)3}2, and reactions with disilazanes provide solvent-free lanthanoid tris(disilazides).
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Affiliation(s)
- Aradhana Pindwal
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - KaKing Yan
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Smita Patnaik
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Bradley M Schmidt
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Arkady Ellern
- Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Igor I Slowing
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
| | - Cheolbeom Bae
- Kumho Petrochemical R&D Center , Daejeon 34044, Republic of Korea
| | - Aaron D Sadow
- U.S. DOE Ames Laboratory, Iowa State University , Ames, Iowa 50011, United States.,Department of Chemistry, Iowa State University , 1605 Gilman Hall, Ames, Iowa 50011, United States
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13
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Korkmaz ŞA, Karadağ A, Aydın A, Yerli Y, Soylu MS. Binuclear cyanido complexes containing [Pt(CN)4]2− building block: Synthesis, crystal structures, magnetic properties and anticancer activities. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Rozenel SS, Perrin L, Eisenstein O, Andersen RA. Experimental and DFT Computational Study of β-Me and β-H Elimination Coupled with Proton Transfer: From Amides to Enamides in Cp*2MX (M = La, Ce). Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00677] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sergio S. Rozenel
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Lionel Perrin
- Université
Lyon 1, CNRS UMR 5246, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Odile Eisenstein
- Institut
Charles Gerhardt, CNRS UMR 5253, Université de Montpellier, Place
E. Bataillon, F-34095 Montpellier, France
| | - Richard A. Andersen
- Department
of Chemistry, University of California, Berkeley, California 94720-1460, United States
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15
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Damon PL, Wu G, Kaltsoyannis N, Hayton TW. Formation of a Ce(IV) Oxo Complex via Inner Sphere Nitrate Reduction. J Am Chem Soc 2016; 138:12743-12746. [PMID: 27622564 DOI: 10.1021/jacs.6b07932] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Reaction of Ce(NO3)3(THF)4 with Li3(THF)3(NN'3) (NN'3 = N(CH2CH2NR)3, R = SitBuMe2) in Et2O, in the presence of 12-crown-4, results in the formation of [Li(12-crown-4)][(NN'3)Ce(O)] (1) in 36% yield. This transformation proceeds via formation of a Ce(III) nitrate intermediate, [Li(12-crown-4)][(NN'3)Ce(κ2-O2NO)] (2), which undergoes inner sphere nitrate reduction. In addition, reaction of 1 with tBuMe2SiCl results in the formation of (NN'3)Ce(OSitBuMe2) (3), confirming the nucleophilic character of its oxo ligand. Natural bond orbital and quantum theory of atoms-in-molecules data reveal the Ce-O interaction in 1 to be significantly covalent, and strikingly similar to analogous U-O bonding.
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Affiliation(s)
- Peter L Damon
- Department of Chemistry & Biochemistry, University of California , Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry & Biochemistry, University of California , Santa Barbara, California 93106, United States
| | - Nikolas Kaltsoyannis
- School of Chemistry, University of Manchester , Oxford Road, Manchester, M13 9PL, U.K
| | - Trevor W Hayton
- Department of Chemistry & Biochemistry, University of California , Santa Barbara, California 93106, United States
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16
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Investigation of agostic interaction through NBO analysis and its impact on β-hydride elimination and dehydrogenation: a DFT approach. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1939-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Conley MP, Lapadula G, Sanders K, Gajan D, Lesage A, del Rosal I, Maron L, Lukens WW, Copéret C, Andersen RA. The Nature of Secondary Interactions at Electrophilic Metal Sites of Molecular and Silica-Supported Organolutetium Complexes from Solid-State NMR Spectroscopy. J Am Chem Soc 2016; 138:3831-43. [PMID: 26887899 DOI: 10.1021/jacs.6b00071] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lu[CH(SiMe3)2]3 reacts with [SiO2-700] to give [(≡SiO)Lu[CH(SiMe3)2]2] and CH2(SiMe3)2. [(≡SiO)Lu[CH(SiMe3)2]2] is characterized by solid-state NMR and EXAFS spectroscopy, which show that secondary Lu···C and Lu···O interactions, involving a γ-CH3 and a siloxane bridge, are present. From X-ray crystallographic analysis, the molecular analogues Lu[CH(SiMe3)2]3-x[O-2,6-tBu-C6H3]x (x = 0-2) also have secondary Lu···C interactions. The (1)H NMR spectrum of Lu[CH(SiMe3)2]3 shows that the -SiMe3 groups are equivalent to -125 °C and inequivalent below that temperature, ΔG(⧧)(Tc = 148 K) = 7.1 kcal mol(-1). Both -SiMe3 groups in Lu[CH(SiMe3)2]3 have (1)JCH = 117 ± 1 Hz at -140 °C. The solid-state (13)C CPMAS NMR spectrum at 20 °C shows three chemically inequivalent resonances in the area ratio of 4:1:1 (12:3:3); the J-resolved spectra for each resonance give (1)JCH = 117 ± 2 Hz. The (29)Si CPMAS NMR spectrum shows two chemically inequivalent resonances with different values of chemical shift anisotropy. Similar observations are obtained for Lu[CH(SiMe3)2]3-x[O-2,6-tBu-C6H3]x (x = 1 and 2). The spectroscopic data point to short Lu···Cγ contacts corresponding to 3c-2e Lu···Cγ-Siβ interactions, which are supported by DFT calculations. Calculated natural bond orbital (NBO) charges show that Cγ carries a negative charge, while Lu, Hγ, and Siβ carry positive charges; as the number of O-based ligands increases so does the positive charge at Lu, which in turns shortens the Lu···Cγ distance. The change in NBO charges and the resulting changes in the spectroscopic and crystallographic properties show how ligands and surface-support sites rearrange to accommodate these changes, consistent with Pauling's electroneutrality concept.
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Affiliation(s)
- Matthew P Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Giuseppe Lapadula
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Kevin Sanders
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - David Gajan
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - Anne Lesage
- Centre de RMN à Très Hauts Champs, CRNS/ENS-Lyon/UCB Lyon 1, Université de Lyon , 5 rue de la Doua, 69100 Villeurbanne, France
| | - Iker del Rosal
- Université de Toulouse and CNRS, LPCNO INSA/UPS/CNRS , 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
| | - Laurent Maron
- Université de Toulouse and CNRS, LPCNO INSA/UPS/CNRS , 135 avenue de Rangueil, 31077 Toulouse Cedex 4, France
| | - Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Richard A Andersen
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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18
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Kefalidis CE, Castro L, Perrin L, Rosal ID, Maron L. New perspectives in organolanthanide chemistry from redox to bond metathesis: insights from theory. Chem Soc Rev 2016; 45:2516-43. [DOI: 10.1039/c5cs00907c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A fifteen year contribution of computational studies carried out in close synergy with experiments is summarized.
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19
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Sayın E, Kürkçüoğlu GS, Yeşilel OZ, Hökelek T. 1D cyanide complexes with 2-pyridinemethanol: Synthesis, crystal structures and spectroscopic properties. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.08.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Dunlop-Brière AF, Baird MC, Budzelaar PHM. [Cp2TiCH2CH2(SiEt2CHMe2)]+, an Alkyl-titanocene(IV) Complex Containing an Unconventional Ti←C(β)-Si Mode of Bonding. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00675] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Michael C. Baird
- The
Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
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21
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Zitz R, Hlina J, Gatterer K, Marschner C, Szilvási T, Baumgartner J. Neutral "Cp-Free" Silyl-Lanthanide(II) Complexes: Synthesis, Structure, and Bonding Analysis. Inorg Chem 2015; 54:7065-72. [PMID: 26132550 PMCID: PMC4510641 DOI: 10.1021/acs.inorgchem.5b01072] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Complexes featuring lanthanide silicon
bonds represent a research area still in its infancy. Herein, we report
a series of Cp-free lanthanide (+II) complexes bearing σ-bonded
silyl ligands. By reactions of LnI2 (Ln = Yb, Eu, Sm) either
with a 1,4-oligosilanyl dianion [K-Si(SiMe3)2SiMe2SiMe2Si(SiMe3)2-K)] (1) or with 2 (Me3Si)3SiK (3) the corresponding neutral metallacyclopentasilanes
({Me2Si(Me3Si)2Si}2)Ln·(THF)4 (Ln = Yb (2a), Eu (2b), Sm (2c)), or the disilylated complexes ({Me3Si}3Si)2Ln·(THF)3 (Ln = Yb (4a), Eu (4b), Sm (4c)), were selectively
obtained. Complexes 2b, 2c, 4b, and 4c represent the first examples of structurally
characterized Cp-free Eu and Sm complexes with silyl ligands. In both
series, a linear correlation was observed between the Ln–Si
bond lengths and the covalent radii of the corresponding lanthanide
metals. Density functional theory calculations were also carried out
for complexes 2a–c and 4a–c to elucidate the bonding situation between
the Ln(+II) centers and Si. By reactions of
LnI2 (Ln = Yb, Eu, Sm) with oligosilanyl anions or dianions,
either neutral disilylated complexes or metallacyclopentasilanes were
obtained.
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Affiliation(s)
- Rainer Zitz
- †Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Johann Hlina
- ‡Institut für Chemie, Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Karl Gatterer
- §Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Christoph Marschner
- †Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Tibor Szilvási
- ∥Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics (BUTE), Szent Gellért tér 4, 1111 Budapest, Hungary
| | - Judith Baumgartner
- ‡Institut für Chemie, Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
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22
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Chung LW, Sameera WMC, Ramozzi R, Page AJ, Hatanaka M, Petrova GP, Harris TV, Li X, Ke Z, Liu F, Li HB, Ding L, Morokuma K. The ONIOM Method and Its Applications. Chem Rev 2015; 115:5678-796. [PMID: 25853797 DOI: 10.1021/cr5004419] [Citation(s) in RCA: 752] [Impact Index Per Article: 83.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Lung Wa Chung
- †Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - W M C Sameera
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Romain Ramozzi
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Alister J Page
- §Newcastle Institute for Energy and Resources, The University of Newcastle, Callaghan 2308, Australia
| | - Miho Hatanaka
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
| | - Galina P Petrova
- ∥Faculty of Chemistry and Pharmacy, University of Sofia, Bulgaria Boulevard James Bourchier 1, 1164 Sofia, Bulgaria
| | - Travis V Harris
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan.,⊥Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States
| | - Xin Li
- #State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Zhuofeng Ke
- ∇School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Fengyi Liu
- ○Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Hai-Bei Li
- ■School of Ocean, Shandong University, Weihai 264209, China
| | - Lina Ding
- ▲School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan 450001, China
| | - Keiji Morokuma
- ‡Fukui Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano Nishihiraki-cho, Sakyo, Kyoto 606-8103, Japan
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23
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González-Montiel S, Martínez-Otero D, Andrade-López N, Alvarado-Rodríguez JG, Carmona-Pichardo M, Cruz-Borbolla J, Pandiyan T, Pineda LW. Experimental and theoretical studies of C–H⋯M interactions in palladium and platinum complexes derived from 1,2-bis-(2-hydroxymethylphenylthio)ethane. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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24
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Schmidt AC, Heinemann FW, Maron L, Meyer K. A Series of Uranium (IV, V, VI) Tritylimido Complexes, Their Molecular and Electronic Structures and Reactivity with CO2. Inorg Chem 2014; 53:13142-53. [DOI: 10.1021/ic5023517] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Anna-Corina Schmidt
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Karsten Meyer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University of Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
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25
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Boyde NC, Chmely SC, Hanusa TP, Rheingold AL, Brennessel WW. Structural Distortions in M[E(SiMe3)2]3 Complexes (M = Group 15, f-Element; E = N, CH): Is Three a Crowd? Inorg Chem 2014; 53:9703-14. [DOI: 10.1021/ic501232z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicholas C. Boyde
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Stephen C. Chmely
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Timothy P. Hanusa
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Arnold L. Rheingold
- University of California, San Diego, La Jolla, California 92093, United States
| | - William W. Brennessel
- X-ray Crystallographic Facility, Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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26
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Xu X, Kehr G, Daniliuc CG, Erker G. Formation of Unsaturated Vicinal Zr+/P Frustrated Lewis Pairs by the Unique 1,1-Carbozirconation Reactions. J Am Chem Soc 2014; 136:12431-43. [DOI: 10.1021/ja5068146] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xin Xu
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerald Kehr
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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27
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Hulley EB, Helm ML, Bullock RM. Heterolytic cleavage of H2 by bifunctional manganese(i) complexes: impact of ligand dynamics, electrophilicity, and base positioning. Chem Sci 2014. [DOI: 10.1039/c4sc01801j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A balance of metal electrophilicity and ligand steric influences is required for facile, reversible H–H heterolytic cleavage in Mn complexes with pendant amines.
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Affiliation(s)
- Elliott B. Hulley
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
| | - Monte L. Helm
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
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28
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Zhu D, Kozera DJ, Enns KD, Budzelaar PHM. Cascade Activation of SiH, CH, and SiC Bonds at a Rhodium β-Diiminate Complex. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206751] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Zhu D, Kozera DJ, Enns KD, Budzelaar PHM. Cascade Activation of SiH, CH, and SiC Bonds at a Rhodium β-Diiminate Complex. Angew Chem Int Ed Engl 2012; 51:12211-4. [DOI: 10.1002/anie.201206751] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Indexed: 11/09/2022]
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30
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Webster CL, Bates JE, Fang M, Ziller JW, Furche F, Evans WJ. Density Functional Theory and X-ray Analysis of the Structural Variability in η5,η5,η1-Tris(ring) Rare Earth/Actinide Tetramethylpyrrolyl Complexes, (C5Me5)2M(NC4Me4). Inorg Chem 2012; 52:3565-72. [DOI: 10.1021/ic300905r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher L. Webster
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Jefferson E. Bates
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Ming Fang
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Joseph W. Ziller
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Filipp Furche
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - William J. Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
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31
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Spicer CW, Lovitt CF, Girolami GS. Nonagostic M···H–C Interactions. Synthesis, Characterization, and DFT Study of the Titanium Amide Ti2Cl6[N(t-Bu)2]2. Organometallics 2012. [DOI: 10.1021/om300483v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Charles W. Spicer
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
| | - Charity Flener Lovitt
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
| | - Gregory S. Girolami
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 South Mathews
Avenue, Urbana, Illinois 61801, United States
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32
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Escudié Y, Dinoi C, Allen O, Vendier L, Etienne M. An Unsymmetrical bis CC Agostic Heterobimetallic Lithium Yttrium Complex. Angew Chem Int Ed Engl 2012; 51:2461-4. [DOI: 10.1002/anie.201107870] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 12/20/2011] [Indexed: 11/08/2022]
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33
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Escudié Y, Dinoi C, Allen O, Vendier L, Etienne M. An Unsymmetrical bis CC Agostic Heterobimetallic Lithium Yttrium Complex. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107870] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Fortier S, Brown JL, Kaltsoyannis N, Wu G, Hayton TW. Synthesis, Molecular and Electronic Structure of UV(O)[N(SiMe3)2]3. Inorg Chem 2012; 51:1625-33. [DOI: 10.1021/ic201936j] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Skye Fortier
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California 93106, United States
| | - Jessie L. Brown
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California 93106, United States
| | - Nikolas Kaltsoyannis
- Department of Chemistry, Christopher
Ingold Laboratories, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Guang Wu
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and
Biochemistry, University of California,
Santa Barbara, California 93106, United States
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35
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On the Nature of β-Agostic Interactions: A Comparison Between the Molecular Orbital and Charge Density Picture. STRUCTURE AND BONDING 2012. [DOI: 10.1007/978-3-642-30802-4_77] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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36
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Çolak AT, Pamuk G, Yeşilel OZ, Yılmaz F. A photoluminescent dinuclear silver(I) complex exhibits CH···Ag close interactions and a new coordination mode of the pyridine-2,3-dicarboxylate. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2011.06.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Luo Y, Luo Y, Qu J, Hou Z. QM/MM Studies on Scandium-Catalyzed Syndiospecific Copolymerization of Styrene and Ethylene. Organometallics 2011. [DOI: 10.1021/om100998c] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Yi Luo
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
| | - Yunjie Luo
- School of Biological and Chemical Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, People's Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, People's Republic of China
- Organometallic Chemistry Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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38
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Occhipinti G, Meermann C, Dietrich HM, Litlabø R, Auras F, Törnroos KW, Maichle-Mössmer C, Jensen VR, Anwander R. Synthesis and stability of homoleptic metal(III) tetramethylaluminates. J Am Chem Soc 2011; 133:6323-37. [PMID: 21466201 DOI: 10.1021/ja2001049] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Whereas a number of homoleptic metal(III) tetramethylaluminates M(AlMe(4))(3) of the rare earth metals have proven accessible, the stability of these compounds varies strongly among the metals, with some even escaping preparation altogether. The differences in stability may seem puzzling given that this class of metals usually is considered to be relatively uniform with respect to properties. On the basis of quantum chemically obtained relative energies and atomic and molecular descriptors of homoleptic tris(tetramethylaluminate) and related compounds of rare earth metals, transition metals, p-block metals, and actinides, multivariate modeling has identified the importance of ionic metal-methylaluminate bonding and small steric repulsion between the methylaluminate ligands for obtaining stable homoleptic compounds. Low electronegativity and a sufficiently large ionic radius are thus essential properties for the central metal atom. Whereas scandium and many transition metals are too small and too electronegative for this task, all lanthanides and actinides covered in this study are predicted to give homoleptic compounds stable toward loss of trimethylaluminum, the expected main decomposition reaction. Three of the predicted lanthanide-based compounds Ln(AlMe(4))(3) (Ln = Ce, Tm, Yb) have been prepared and fully characterized in the present work, in addition to Ln(OCH(2)tBu)(3)(AlMe(3))(3) (Ln = Sc, Nd) and [Eu(AlEt(4))(2)](n). At ambient temperature, donor-free hexane solutions of Ln(AlMe(4))(3) of the Ln(3+)/Ln(2+) redox-active metal centers display enhanced reduction to [Ln(AlMe(4))(2)](n) with decreasing negative redox potential, in the order Eu ≫ Yb ≫ Sm. Whereas Eu(AlMe(4))(3) could not be identified, Yb(AlMe(4))(3) turned out to be isolable in low yield. All attempts to prepare the putative Sc(AlMe(4))(3), featuring the smallest rare earth metal center, failed.
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Affiliation(s)
- Giovanni Occhipinti
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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39
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Çolak AT, Yeşilel OZ, Büyükgüngör O. A novel anagostic CH⋯Cu interaction and clustered water molecules in copper(II)–pyridine-2,5-dicarboxylate complex. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.01.070] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Scherer W, Herz V, Brück A, Hauf C, Reiner F, Altmannshofer S, Leusser D, Stalke D. The Nature of β‐Agostic Bonding in Late‐Transition‐Metal Alkyl Complexes. Angew Chem Int Ed Engl 2011; 50:2845-9. [DOI: 10.1002/anie.201006065] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Wolfgang Scherer
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
| | - Verena Herz
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
| | - Andreas Brück
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
| | - Christoph Hauf
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
| | - Florian Reiner
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
| | - Sandra Altmannshofer
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Germany), Fax: (+49) 821‐598‐3227
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
| | - Dirk Leusser
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
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Scherer W, Herz V, Brück A, Hauf C, Reiner F, Altmannshofer S, Leusser D, Stalke D. Über die Natur der β‐agostischen Bindung in späten Übergangsmetall‐Alkyl‐Komplexen. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006065] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wolfgang Scherer
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
| | - Verena Herz
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
| | - Andreas Brück
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
| | - Christoph Hauf
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
| | - Florian Reiner
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
| | - Sandra Altmannshofer
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg (Deutschland), Fax: (+49) 821‐598‐3227
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstraße 4, 37077 Göttingen (Deutschland)
| | - Dirk Leusser
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstraße 4, 37077 Göttingen (Deutschland)
| | - Dietmar Stalke
- Institut für Anorganische Chemie, Georg‐August‐Universität Göttingen, Tammannstraße 4, 37077 Göttingen (Deutschland)
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Fullmer BC, Fan H, Pink M, Huffman JC, Tsvetkov NP, Caulton KG. Three-Coordinate NiII: Tracing the Origin of an Unusual, Facile Si−C(sp3) Bond Cleavage in [(tBu2PCH2SiMe2)2N]Ni+. J Am Chem Soc 2011; 133:2571-82. [DOI: 10.1021/ja108426f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin C. Fullmer
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Hongjun Fan
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Maren Pink
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - John C. Huffman
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Nikolay P. Tsvetkov
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Kenneth G. Caulton
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
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Zhang XW, Maunder GH, Gießmann S, MacDonald R, Ferguson MJ, Bond AH, Rogers RD, Sella A, Takats J. Stable heteroleptic complexes of divalent lanthanides with bulky pyrazolylborate ligands – iodides, hydrocarbyls and triethylborohydrides. Dalton Trans 2011; 40:195-210. [DOI: 10.1039/c0dt00162g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zimmermann M, Anwander R. Homoleptic Rare-Earth Metal Complexes Containing Ln−C σ-Bonds. Chem Rev 2010; 110:6194-259. [DOI: 10.1021/cr1001194] [Citation(s) in RCA: 232] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Melanie Zimmermann
- Department of Chemistry, University of Bergen, Allégaten 41, 5007 Bergen, Norway, and Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Reiner Anwander
- Department of Chemistry, University of Bergen, Allégaten 41, 5007 Bergen, Norway, and Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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Scherer W, Wolstenholme DJ, Herz V, Eickerling G, Brück A, Benndorf P, Roesky PW. On the nature of agostic interactions in transition-metal amido complexes. Angew Chem Int Ed Engl 2010; 49:2242-6. [PMID: 20187050 DOI: 10.1002/anie.200905463] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wolfgang Scherer
- Institut für Physik, Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, 86135 Augsburg, Germany.
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Scherer W, Wolstenholme D, Herz V, Eickerling G, Brück A, Benndorf P, Roesky P. Über die Natur agostischer Wechselwirkungen in Übergangsmetall-Amido-Komplexen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905463] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yu X, Chen SJ, Wang X, Chen XT, Xue ZL. Synthesis and Characterization of Group 4 Amide Chloride and Amide Imide Complexes. Organometallics 2009. [DOI: 10.1021/om900070k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xianghua Yu
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Shu-Jian Chen
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
| | - Xiaoping Wang
- Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6475
| | - Xue-Tai Chen
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People's Republic of China
| | - Zi-Ling Xue
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
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Strelkov MV, Zaripov RB, Dzhabarov VI, Knyazev AA, Salikhov KM, Voronkova VK, Galyametdinov YG. Structure of the LnIII tris(β-diketonate) adduct with substituted bipyridine determined by the ESR and computer simulation data. Russ Chem Bull 2009. [DOI: 10.1007/s11172-008-0202-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xue L, Ng KC, Lin Z. Theoretical studies on β-aryl elimination from Rh(i) complexes. Dalton Trans 2009:5841-50. [DOI: 10.1039/b902539a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fan H, Fullmer B, Pink M, Caulton K. [Ni{N(SiMe2CH2PtBu2)2}]+: Direct Observation of Transannular SiC(sp3) Bond Coordination. Angew Chem Int Ed Engl 2008; 47:9112-4. [DOI: 10.1002/anie.200802654] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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