101
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Hamdaoui M, Ney M, Sarda V, Karmazin L, Bailly C, Sieffert N, Dohm S, Hansen A, Grimme S, Djukic JP. Evidence of a Donor–Acceptor (Ir–H)→SiR3 Interaction in a Trapped Ir(III) Silane Catalytic Intermediate. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00248] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mustapha Hamdaoui
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Marjolaine Ney
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Vivien Sarda
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Lydia Karmazin
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Corinne Bailly
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Nicolas Sieffert
- Université Grenoble Alpes & CNRS, DCM UMR 5250, F-38000 Grenoble, France
| | - Sebastian Dohm
- Mulliken
Center for Theoretical Chemistry, Institut für Physikalische
und Theoretische Chemie, Universität Bonn, Beringstraße
4, D-53115 Bonn, Germany
| | - Andreas Hansen
- Mulliken
Center for Theoretical Chemistry, Institut für Physikalische
und Theoretische Chemie, Universität Bonn, Beringstraße
4, D-53115 Bonn, Germany
| | - Stefan Grimme
- Mulliken
Center for Theoretical Chemistry, Institut für Physikalische
und Theoretische Chemie, Universität Bonn, Beringstraße
4, D-53115 Bonn, Germany
| | - Jean-Pierre Djukic
- Institut
de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
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102
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Huang D, Yin L, Niu J. Photoinduced Hydrodefluorination Mechanisms of Perfluorooctanoic Acid by the SiC/Graphene Catalyst. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:5857-5863. [PMID: 27128100 DOI: 10.1021/acs.est.6b00652] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cleavage of the strong carbon-fluorine bonds is critical for elimination of perfluorooctanoic acid (PFOA) from the environment. In this work, we investigated the decomposition of PFOA with the SiC/graphene catalyst under UV light irradiation. The decomposition rate constant (k) with SiC/graphene was 0.096 h(-1), 2.2 times higher than that with commercial nano-TiO2. Surface fluorination on SiC/graphene was analyzed by X-ray photoelectron spectroscopy (XPS), revealing the conversions of Si-H bonds into Si-F bonds. A different route was found to generate the reactive Si-H bonds on SiC/graphene, substituting for silylium (R3Si(+)) to activate C-F bonds. During the activation process, photogenerated electrons on SiC transfer rapidly to perfluoroalkyl groups by the medium of graphene, further reducing the electron cloud density of C-F bonds to promote the activation. The hydrogen-containing hydrodefluorination intermediates including (CF3(CF2)2CFH, CF3(CF2)3CH2, CF3(CF2)4CH2, and CF3(CF2)4CFHCOOH) were detected to verify the hydrodefluorination process. The photoinduced hydrodefluorination mechanisms of PFOA can be consequently inferred as follows: (1) fluorine atoms in perfluoroalkyl groups were replaced by hydrogen atoms due to the nucleophilic substitution reaction via the Si-H/C-F redistribution, and (2) generation of CH2 carbene from the hydrogen-containing perfluoroalkyl groups and the C-C bonds scission by the Photo-Kolbe decarboxylation reaction under UV light excitation. This photoinduced hydrodefluorination provides insight into the photocatalytic decomposition of perfluorocarboxylic acids (PFCAs) in an aqueous environment.
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Affiliation(s)
- Dahong Huang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, P.R. China
| | - Lifeng Yin
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, P.R. China
| | - Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, P.R. China
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103
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Gehring H, Metzinger R, Braun B, Herwig C, Harder S, Ray K, Limberg C. An iron(ii) hydride complex of a ligand with two adjacent β-diketiminate binding sites and its reactivity. Dalton Trans 2016; 45:2989-96. [PMID: 26757878 PMCID: PMC5536248 DOI: 10.1039/c5dt04266f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
After lithiation of PYR-H2 (PYR = [(NC(Me)C(H)C(Me)NC6H3(iPr)2)2(C5H3N)](2-)) - the precursor of an expanded β-diketiminato ligand system with two binding pockets - with KN(TMS)2 the reaction of the resulting potassium salt with FeBr2 led to a dinuclear iron(ii) bromide complex [(PYR)Fe(μ-Br)2Fe] (1). Through treatment with KHBEt3 the bromide ligands could be replaced by hydrides to yield [PYR)Fe2(μ-H)2] (2), a distorted analogue of known β-diketiminato iron hydride complexes, as evidenced by NMR, Mößbauer and X-ray absorption spectroscopy, as well as by its reactivity: for instance, 2 reacts with the proton source lutidinium triflate via protonation of the hydride ligands to form an iron(ii) product [(PYR)Fe2(OTf)2] (4), while CO2 inserts into the Fe-H bonds generating the formate complex [(PYR)Fe2(μ-HCOO)2] (5); in the presence of traces of water partial hydrolysis occurs so that [(PYR)Fe2(μ-OH)(μ-HCOO)] (6) is isolated. Altogether, the iron(ii) chemistry supported by the PYR(2-) ligand is distinctly different from the one of nickel(ii), where both, the arrangement of the two binding pockets and the additional pyridyl donor led to diverging features as compared with the corresponding system based on the parent β-diketiminato ligand.
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Affiliation(s)
- Henrike Gehring
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
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104
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Hu JY, Zhang J, Wang GX, Sun HL, Zhang JL. Constructing a Catalytic Cycle for C-F to C-X (X = O, S, N) Bond Transformation Based on Gold-Mediated Ligand Nucleophilic Attack. Inorg Chem 2016; 55:2274-83. [PMID: 26872251 DOI: 10.1021/acs.inorgchem.5b02634] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A tricoordinated gold(I) chloride complex, tBuXantphosAuCl, supported by a sterically bulky 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene ligand (tBuXantphos) was synthesized. This complex features a remarkably longer Au-Cl bond length [2.632(1) Å] than bicoordinated linear gold complexes (2.27-2.30 Å) and tricoordinated XantphosAuCl [2.462(1) Å]. Single-crystal X-ray diffraction analysis of a cocrystal of tBuXantphosAuCl and pentafluoronitrobenzene (PFNB) and UV-vis spectroscopic titration experiments revealed the existence of an anion-π interaction between the Cl anion ligand and PFNB. Stoichiometric reaction between PFNB and tBuXantphosAuOtBu, after replacement of Cl by a more nucleophilic tBuO anion ligand, showed higher reactivity and para selectivity in the transformation of C-F to C-OtBu bond, distinctively different from that when only KOtBu was used (ortho selectivity) under the identical condition. Mechanistic studies including density functional theory calculations suggested a gold-mediated nucleophilic ligand attack of the C-F bond pathway via an SNAr process. On the basis of these results, using trimethylsilyl derivatives TMS-X (X = OMe, SEt, NEt2) as the nucleophilic ligand source and the fluorine acceptor, catalytic transformation of the C-F bond of aromatic substrates to the C-X (X = O, S, N) bond was achieved with tBuXantphosAuCl as the catalyst (up to 20 turnover numbers).
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Affiliation(s)
- Ji-Yun Hu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P. R. China
| | - Jing Zhang
- College of Materials Science and Optoelectronics Technology, Graduate University of Chinese Academy of Sciences , Beijing 100049, P. R. China
| | - Gao-Xiang Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P. R. China
| | - Hao-Ling Sun
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University , Beijing 100875, P. R. China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P. R. China
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105
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Liu C, Zhang B. Facile Access to Fluoroaromatic Molecules by Transition-Metal-Free C-F Bond Cleavage of Polyfluoroarenes: An Efficient, Green, and Sustainable Protocol. CHEM REC 2016; 16:667-87. [DOI: 10.1002/tcr.201500248] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Indexed: 01/23/2023]
Affiliation(s)
- Cuibo Liu
- Department of Chemistry; School of Science, Tianjin University; Tianjin 300072 P. R. China
| | - Bin Zhang
- Department of Chemistry; School of Science, Tianjin University; Tianjin 300072 P. R. China
- Collaborative Innovation; Center of Chemical Science and Engineering; Tianjin 300072 P. R. China
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106
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Ahrens T, Ahrens M, Braun T, Braun B, Herrmann R. Synthesis of a rhodium(i) germyl complex: a useful tool for C–H and C–F bond activation reactions. Dalton Trans 2016; 45:4716-28. [DOI: 10.1039/c5dt04845a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rhodium(i) germyl complex [Rh(GePh3)(PEt3)3] is a useful tool for C–F and C–H bond activation reactions. For instance, treatment with hexafluoropropene results in the formation of two isomeric C–F activation products [Rh{(E)-CFCF(CF3)}(PEt3)3] and [Rh{(Z)-CFCF(CF3)}(PEt3)3] in a 3 : 1 ratio.
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Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Mike Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Thomas Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Beatrice Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Roy Herrmann
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
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107
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Ahrens T, Teltewskoi M, Ahrens M, Braun T, Laubenstein R. Competing reaction pathways of 3,3,3-trifluoropropene at rhodium hydrido, silyl and germyl complexes: C–F bond activation versus hydrogermylation. Dalton Trans 2016; 45:17495-17507. [DOI: 10.1039/c6dt03027k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of the Rh complexes [Rh(L)(PEt3)3] (L = H, Si(OEt)3, GePh3) towards CH2CHCF3 was investigated which involve C–F bond activation and germylation reactions.
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Affiliation(s)
- Theresia Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Michael Teltewskoi
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Mike Ahrens
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Thomas Braun
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
| | - Reik Laubenstein
- Humboldt-Universität zu Berlin
- Department of Chemistry
- D-12489 Berlin
- Germany
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108
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Krüger J, Ehm C, Lentz D. Improving selectivity in catalytic hydrodefluorination by limiting SNV reactivity. Dalton Trans 2016; 45:16789-16798. [DOI: 10.1039/c6dt02961b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Competition of HM, SBM and SNV in hydrodefluorination can lead to low selectivity which can be improved via solvent change.
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Affiliation(s)
- Juliane Krüger
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Christian Ehm
- Dipartimento di Scienze Chimiche
- Università di Napoli Federico II
- 80126 Napoli
- Italy
| | - Dieter Lentz
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
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109
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Liu X, Wang Z, Zhao X, Fu X. Light induced catalytic hydrodefluorination of perfluoroarenes by porphyrin rhodium. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00269a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocatalytic hydrodefluorination of a series of perfluoroarenes by rhodium porphyrin complexes was described. The key intermediate (por)Rh-C6F4R underwent fast photo-cleavage of Rh–C bonds to produce hydrodefluorination products.
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Affiliation(s)
- Xu Liu
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing
| | - Zikuan Wang
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing
| | - Xianyuan Zhao
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing
| | - Xuefeng Fu
- Beijing National Laboratory for Molecular Sciences
- State Key Lab of Rare Earth Materials Chemistry and Applications
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing
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110
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Wang L, Sun H, Li X, Fuhr O, Fenske D. The selective activation of a C–F bond with an auxiliary strong Lewis acid: a method to change the activation preference of C–F and C–H bonds. Dalton Trans 2016; 45:18133-18141. [DOI: 10.1039/c6dt03235d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective activations of C–F bond in substituted (2,6-difluorophenyl)phenylimines by Fe(PMe3)4 with an auxiliary strong Lewis acid were explored.
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Affiliation(s)
- Lin Wang
- School of Chemistry and Chemical Engineering
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- Shandong University
- 250199 Jinan
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- Shandong University
- 250199 Jinan
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- Shandong University
- 250199 Jinan
| | - Olaf Fuhr
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF)
- Karlsruher Institut für Technologie (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Dieter Fenske
- Institut für Nanotechnologie (INT) und Karlsruher Nano-Micro-Facility (KNMF)
- Karlsruher Institut für Technologie (KIT)
- 76344 Eggenstein-Leopoldshafen
- Germany
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111
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Liu XW, Echavarren J, Zarate C, Martin R. Ni-Catalyzed Borylation of Aryl Fluorides via C–F Cleavage. J Am Chem Soc 2015; 137:12470-3. [DOI: 10.1021/jacs.5b08103] [Citation(s) in RCA: 176] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiang-Wei Liu
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Javier Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Cayetana Zarate
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluïs Companys, 23, 08010 Barcelona, Spain
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112
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King AK, Buchard A, Mahon MF, Webster RL. Facile, Catalytic Dehydrocoupling of Phosphines Using β‐Diketiminate Iron(II) Complexes. Chemistry 2015; 21:15960-3. [DOI: 10.1002/chem.201503399] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Indexed: 12/17/2022]
Affiliation(s)
- Andrew K. King
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY (UK)
| | - Antoine Buchard
- 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)
| | - Ruth L. Webster
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY (UK)
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113
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Pedersen KS, Sørensen MA, Bendix J. Fluoride-coordination chemistry in molecular and low-dimensional magnetism. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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114
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Lee Y, Anderton KJ, Sloane FT, Ermert DM, Abboud KA, García-Serres R, Murray LJ. Reactivity of Hydride Bridges in High-Spin [3M-3(μ-H)] Clusters (M = FeII, CoII). J Am Chem Soc 2015; 137:10610-7. [PMID: 26270596 DOI: 10.1021/jacs.5b05204] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The designed [3M-3(μ-H)] clusters (M = Fe(II), Co(II)) Fe3H3L (1-H) and Co3H3L (2-H) [where L(3-) is a tris(β-diketiminate) cyclophane] were synthesized by treating the corresponding M3Br3L complexes with KBEt3H. From single-crystal X-ray analysis, the hydride ligands are sterically protected by the cyclophane ligand, and these complexes selectively react with CO2 over other unsaturated substrates (e.g., CS2, Me3SiCCH, C2H2, and CH3CN). The reaction of 1-H or 2-H with CO2 at room temperature yielded Fe3(OCHO)(H)2L (1-CO2) or Co3(OCHO)(H)2L (2-CO2), respectively, which evidence the differential reactivity of the hydride ligands within these complexes. The analogous reactions at elevated temperatures revealed a distinct difference in the reactivity pattern for 2-H as compared to 1-H; Fe3(OCHO)3L (1-3CO2) was generated from 1-H, while 2-H afforded only 2-CO2.
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Affiliation(s)
- Yousoon Lee
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
| | - Kevin J Anderton
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
| | - Forrest T Sloane
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
| | - David M Ermert
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
| | - Khalil A Abboud
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
| | - Ricardo García-Serres
- Université Grenoble Alpes, LCBM/PMB and CEA, iRTSV/CBM/PMB and CNRS, UMR 5249, LCBM/PMB, 38000 Grenoble, France
| | - Leslie J Murray
- Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States
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115
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Chen C, Bellows SM, Holland PL. Tuning steric and electronic effects in transition-metal β-diketiminate complexes. Dalton Trans 2015; 44:16654-70. [PMID: 26244489 DOI: 10.1039/c5dt02215k] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
β-Diketiminates are widely used supporting ligands for building a range of metal complexes with different oxidation states, structures, and reactivities. This Perspective summarizes the steric and electronic influences of ligand substituents on these complexes, with an eye toward informing the design of new complexes with optimized properties. The backbone and N-aryl substituents can give significant steric effects on structure, reactivity and selectivity of reactions. The electron density on the metal can be tuned by installation of electron withdrawing or donating groups on the β-diketiminate ligand as well. Examples are shown from throughout the transition metal series to demonstrate different types of effects attributable to systematic variation of β-diketiminate ligands.
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Affiliation(s)
- Chi Chen
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, USA.
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116
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Zámostná L, Braun T. Catalytic Degradation of Sulfur Hexafluoride by Rhodium Complexes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505462] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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117
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Zámostná L, Braun T. Catalytic Degradation of Sulfur Hexafluoride by Rhodium Complexes. Angew Chem Int Ed Engl 2015; 54:10652-6. [DOI: 10.1002/anie.201505462] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Indexed: 11/10/2022]
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118
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Wang X, Zhang J, Wang L, Deng L. High-Spin Iron(II) Alkynyl Complexes with N-Heterocyclic Carbene Ligation: Synthesis, Characterization, and Reactivity Study. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00028] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaojie Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People’s Republic of China, 200032
| | - Jia Zhang
- State Key Laboratory of Organometallic Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People’s Republic of China, 200032
| | - Lei Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People’s Republic of China, 200032
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, People’s Republic of China, 200032
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119
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Wang L, Sun H, Li X. Synthesis of Iron Hydrides by Selective C-F/C-H Bond Activation in Fluoroarylimines and Their Applications in Catalytic Reduction Reactions. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500313] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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120
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Affiliation(s)
- Ingmar Bauer
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
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121
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Beck R, Camadanli S, Flörke U, Klein HF. Reaction cascade: Ortho-C–H activation and C–C coupling of benzophenone leading to tetranuclear organoiron and mononuclear organocobalt complexes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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122
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McKay D, Riddlestone IM, Macgregor SA, Mahon MF, Whittlesey MK. Mechanistic Study of Ru-NHC-Catalyzed Hydrodefluorination of Fluoropyridines: The Influence of the NHC on the Regioselectivity of C–F Activation and Chemoselectivity of C–F versus C–H Bond Cleavage. ACS Catal 2015. [DOI: 10.1021/cs501644r] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- David McKay
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Ian M. Riddlestone
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Stuart A. Macgregor
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Mary F. Mahon
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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123
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124
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Kong X, Zhang H, Xiao Y, Cao C, Shi Y, Pang G. Effective, transition metal free and selective C–F activation under mild conditions. RSC Adv 2015. [DOI: 10.1039/c4ra13753a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and effective aromatic nucleophilic monosubstitution reaction for the synthesis of aromatic amines via selective C–F bond cleavage of various fluoroarenes with primary and secondary aromatic amines is demonstrated.
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Affiliation(s)
- Xianqiang Kong
- School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Huizi Zhang
- School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yunqing Xiao
- School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Changsheng Cao
- School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yanhui Shi
- School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Guangsheng Pang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
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125
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Mathivathanan L, Al-Ameed K, Lazarou K, Trávníček Z, Sanakis Y, Herchel R, McGrady JE, Raptis RG. A trigonal prismatic Cu6-pyrazolato complex containing a μ6-F ligand. Dalton Trans 2015; 44:20685-91. [DOI: 10.1039/c5dt03892h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The encapsulation of a fluoride ion in a trigonal prismatic CuII6-pyrazolato cage results in a small expansion of the Cu6-host.
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Affiliation(s)
- Logesh Mathivathanan
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
| | - Karrar Al-Ameed
- Department of Chemistry
- South Parks Road
- University of Oxford
- UK
| | - Katerina Lazarou
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Attiki
- Greece
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - Yiannis Sanakis
- Institute of Nanoscience and Nanotechnology
- NCSR “Demokritos”
- Attiki
- Greece
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials
- Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
| | - John E. McGrady
- Department of Chemistry
- South Parks Road
- University of Oxford
- UK
| | - Raphael G. Raptis
- Department of Chemistry and Biochemistry
- Florida International University
- Miami
- USA
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126
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Maity A, Stanek RJ, Anderson BL, Zeller M, Hunter AD, Moore CE, Rheingold AL, Gray TG. Fluoride Complexes of Cyclometalated Iridium(III). Organometallics 2014. [DOI: 10.1021/om5009555] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ayan Maity
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Robert J. Stanek
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Bryce L. Anderson
- Department
of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Matthias Zeller
- Department
of Chemistry, Youngstown State University, Youngstown, Ohio 44555, United States
| | - Allen D. Hunter
- Department
of Chemistry, Youngstown State University, Youngstown, Ohio 44555, United States
| | - Curtis E. Moore
- Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Arnold L. Rheingold
- Department
of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Thomas G. Gray
- Department
of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
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127
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Ekkert O, Strudley SDA, Rozenfeld A, White AJP, Crimmin MR. Rhodium Catalyzed, Carbon–Hydrogen Bond Directed Hydrodefluorination of Fluoroarenes. Organometallics 2014. [DOI: 10.1021/om501113j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Olga Ekkert
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | | | - Alisa Rozenfeld
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Andrew J. P. White
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Mark R. Crimmin
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
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128
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Base initiated aromatization/CO bond formation: a new entry to O-pyrazole polyfluoroarylated ethers. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.129] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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129
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Schwartsburd L, Mahon MF, Poulten RC, Warren MR, Whittlesey MK. Mechanistic Studies of the Rhodium NHC Catalyzed Hydrodefluorination of Polyfluorotoluenes. Organometallics 2014. [DOI: 10.1021/om500827d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Leonid Schwartsburd
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Mary F. Mahon
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Rebecca C. Poulten
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Mark R. Warren
- Station I19, Diamond Lightsource Ltd., Harwell Science
and Innovation Campus, Didcot OX11 ODE, U.K
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130
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Ohashi M, Shibata M, Ogoshi S. Regioselective CF Bond Activation of Hexafluoropropylene on Palladium(0): Formation of a Cationic η2-Perfluoroallylpalladium Complex. Angew Chem Int Ed Engl 2014; 53:13578-82. [DOI: 10.1002/anie.201408467] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Indexed: 11/11/2022]
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131
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Ohashi M, Shibata M, Ogoshi S. Regioselective CF Bond Activation of Hexafluoropropylene on Palladium(0): Formation of a Cationic η2-Perfluoroallylpalladium Complex. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408467] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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132
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Nakai H, Jeong K, Matsumoto T, Ogo S. Catalytic C–F Bond Hydrogenolysis of Fluoroaromatics by [(η5-C5Me5)RhI(2,2′-bipyridine)]. Organometallics 2014. [DOI: 10.1021/om500647h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Hidetaka Nakai
- Department
of Chemistry and Biochemistry, Graduate
School of Engineering, and ‡International Institute for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kihun Jeong
- Department
of Chemistry and Biochemistry, Graduate
School of Engineering, and ‡International Institute for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takahiro Matsumoto
- Department
of Chemistry and Biochemistry, Graduate
School of Engineering, and ‡International Institute for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Seiji Ogo
- Department
of Chemistry and Biochemistry, Graduate
School of Engineering, and ‡International Institute for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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133
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Whittlesey MK, Peris E. Catalytic Hydrodefluorination with Late Transition Metal Complexes. ACS Catal 2014. [DOI: 10.1021/cs500887p] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Eduardo Peris
- Departamento de
Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat s/n, 12071 Castellón, Spain
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134
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Morris WD, Wolczanski PT, Sutter J, Meyer K, Cundari TR, Lobkovsky EB. Iron and chromium complexes containing tridentate chelates based on nacnac and imino- and methyl-pyridine components: triggering C-X bond formation. Inorg Chem 2014; 53:7467-84. [PMID: 25010819 DOI: 10.1021/ic500807y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nacnac-based tridentate ligands containing a pyridyl-methyl and a 2,6-dialkyl-phenylamine (i.e., (2,6-R2-C6H3N═C(Me)CH═C(Me)NH(CH2py); R = Et, {Et(nn)PM}H; R = (i)Pr, {(i)Pr(nn)PM}H) were synthesized by condensation routes. Treatment of M{N(TMS)2}THFn (M = Cr, n = 2; M = Fe, Co, n = 1; TMS = trimethylsilane; THF = tetrahydrofuran) with {(i)Pr(nn)PM}H) afforded {(i)Pr(nn)PM}MN(TMS)2 (1-M(iPr); M = Cr, Fe); {Et(nn)PM}MN(TMS)2 (1-M(Et); M = Fe, Co) was similarly obtained. {R(nn)PM}FeBr (R = (i)Pr, Et; 2-Fe(R)) were prepared from FeBr2 and {R(nn)PM}Li, and alkylated to generate {R(nn)PM}Fe(neo)Pe (R = (i)Pr, Et; 3-Fe(R)). Carbonylation of 3-Fe(R) provided {(i)Pr(nn)PM}Fe(CO(neo)Pe)CO (4-Fe(iPr)), and carbonylations of 1-Fe(R) (R = Et, (i)Pr) and 1-Cr(iPr) induced deamination to afford {R(nn)PI}Fe(CO)2 (R = (i)Pr, 5-Fe(iPr); Et, 5-Fe(Et)), where PI is pyridine-imine, and {κ(2)-N,N-pyrim-pyr}Cr(CO)4 (6-Cr(iPr)), in which the aryl-amide side of the nacnac attacked the incipient PI group. Carbon-carbon bonds were formed at the imine carbon of the {R(nn)PI} ligand. Addition of [{(i)Pr(nn)PI}(2-)](K(+)(THF)x)2 to FeCl3 generated {(i)Pr(nn)CHpy}2Fe2Cl2 (7-Fe(iPr)), and TMSN3 induced the deamination of 1-Fe(Et), but with disproportionation to provide {[Et(nn)CHpy]2}Fe (8-Fe(Et)). Ph2CN2 induced C-C bond formation with 1-Fe(iPr) via its thermal degradation to ultimately afford {(i)Pr(nn)CHpy}2(FeN═CPh2)2 (9-Fe(iPr)). The compounds were examined by X-ray crystallography (1-M(iPr), M = Cr, Fe; 1-Co(Et); 2-Fe(iPr); 4-Fe(iPr); 5-Fe(iPr); 6-Cr(iPr); 7-Fe(iPr); 8-Fe(Et); 9-Fe(iPr)), Mössbauer spectroscopy, and NMR spectroscopy. Structural parameters assessing redox noninnocence are discussed, as are structural and mechanistic consequences of the various electronic environments.
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Affiliation(s)
- Wesley D Morris
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University , Ithaca, New York 14853, United States
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135
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Influence of the Diphosphine Coordinated to Molybdenum and Tungsten Triangular M3S4 Cluster Hydrides in the Catalytic Hydrodefluorination of Pentafluoropyridine. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0733-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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136
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Ichitsuka T, Fujita T, Arita T, Ichikawa J. Double CF Bond Activation through β-Fluorine Elimination: Nickel-Mediated [3+2] Cycloaddition of 2-Trifluoromethyl-1-alkenes with Alkynes. Angew Chem Int Ed Engl 2014; 53:7564-8. [DOI: 10.1002/anie.201402695] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Indexed: 01/29/2023]
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137
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Ichitsuka T, Fujita T, Arita T, Ichikawa J. Double CF Bond Activation through β-Fluorine Elimination: Nickel-Mediated [3+2] Cycloaddition of 2-Trifluoromethyl-1-alkenes with Alkynes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402695] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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138
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Meier G, Steck V, Braun B, Eißler A, Herrmann R, Ahrens M, Laubenstein R, Braun T. Synthesis and Structures of Fluorinated (β‐Diketiminato)rhodium Complexes: Si–H Activation of Silanes at a Carbonyl Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gregor Meier
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Viktoria Steck
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Beatrice Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Anna Eißler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Roy Herrmann
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Mike Ahrens
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Reik Laubenstein
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
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139
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Williams VA, Wolczanski PT, Sutter J, Meyer K, Lobkovsky EB, Cundari TR. Iron complexes derived from {nacnac-(CH2py)2}- and {nacnac-(CH2py)(CHpy)}n ligands: stabilization of iron(II) via redox noninnocence. Inorg Chem 2014; 53:4459-74. [PMID: 24762120 DOI: 10.1021/ic5001123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nacnac-based tetradentate chelates, {nacnac-(CH2py)2}(-) ({nn(PM)2}(-)) and {nacnac-(CH2py)(CHpy)}(n) ({nn(PM)(PI)}(n)) have been investigated in iron complexes. Treatment of Fe{N(TMS)2}2(THF) with {nn(PM)2}H afforded {nn(PM)2}FeN(TMS)2 [1-N(TMS)2], which led to {nn(PM)2}FeCl (1-Cl) from HCl and to {nn(PM)2}FeN3 (1-N3) upon salt metathesis. Dehydroamination of 1-N(TMS)2 was induced by L (L = PMe3, CO) to afford {nn(PM)(PI)}Fe(PMe3)2 [2-(PMe3)2] and {nn(PM)(PI)}FeCO (3-CO). Substitution of 2-(PMe3)2 led to {nn(PM)(PI)}Fe(PMe3)CO [2-(PMe3)CO], and exposure to a vacuum provided {nn(PM)(PI)}Fe(PMe3) (3-PMe3). Metathesis routes to {nn(PM)(PI)}FeL2 (2-L2; L = PMe3, PMe2Ph) and {nn(PM)(PI)}FeL (3-L; L = PMePh2, PPh3) from [{nn(PM)(PI)}(2-)]Li2 and FeBr2(THF)2 in the presence of L proved feasible, and 1e(-) and 2e(-) oxidation of 2-(PMe3)2 afforded 2(+)-(PMe3)2 and 2(2+)-(PMe3)2 salts. Mössbauer spectroscopy, structural studies, and calculational assessments revealed the dominance of iron(II) in both high-spin (1-X) and low-spin (2-L2 and 3-L) environments, and the redox noninnocence (RNI) of {nn(PM)(PI)}(n) [2-L2, 3-L, n = 2-; 2(+)-(PMe3)2, n = 1-; 2(2+)-(PMe3)2, n = 0]. A discussion regarding the utility of RNI in chemical reactivity is proffered.
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Affiliation(s)
- Valerie A Williams
- Baker Laboratory, Department of Chemistry & Chemical Biology, Cornell University , Ithaca, New York 14853, United States
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140
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Wang W, Rauchfuss TB, Zhu L, Zampella G. New reactions of terminal hydrides on a diiron dithiolate. J Am Chem Soc 2014; 136:5773-82. [PMID: 24661238 DOI: 10.1021/ja501366j] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Mechanisms for biological and bioinspired dihydrogen activation and production often invoke the intermediacy of diiron dithiolato dihydrides. The first example of such a Fe2(SR)2H2 species is provided by the complex [(term-H)(μ-H)Fe2(pdt)(CO)(dppv)2] ([H1H](0)). Spectroscopic and computational studies indicate that [H1H](0) contains both a bridging hydride and a terminal hydride, which, notably, occupies a basal site. The synthesis begins with [(μ-H)Fe2(pdt)(CO)2(dppv)2](+) ([H1(CO)](+)), which undergoes substitution to afford [(μ-H)Fe2(pdt)(CO)(NCMe)(dppv)2](+) ([H1(NCMe)](+)). Upon treatment of [H1(NCMe)](+) with borohydride salts, the MeCN ligand is displaced to afford [H1H](0). DNMR (EXSY, SST) experiments on this complex show that the terminal and bridging hydride ligands interchange intramolecularly at a rate of 1 s(-1) at -40 °C. The compound reacts with D2 to afford [D1D](0), but not mixed isotopomers such as [H1D](0). The dihydride undergoes oxidation with Fc(+) under CO to give [1(CO)](+) and H2. Protonation in MeCN solution gives [H1(NCMe)](+) and H2. Carbonylation converts [H1H](0) into [1(CO)](0).
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Affiliation(s)
- Wenguang Wang
- School of Chemical Sciences University of Illinois - Urbana , Urbana, Illinois 61801, United States
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141
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Arévalo A, Tlahuext-Aca A, Flores-Alamo M, García JJ. On the Catalytic Hydrodefluorination of Fluoroaromatics Using Nickel Complexes: The True Role of the Phosphine. J Am Chem Soc 2014; 136:4634-9. [DOI: 10.1021/ja412268y] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Alma Arévalo
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Interior, Ciudad Universitaria, Mexico City 04510, México
| | - Adrian Tlahuext-Aca
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Interior, Ciudad Universitaria, Mexico City 04510, México
| | - Marcos Flores-Alamo
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Interior, Ciudad Universitaria, Mexico City 04510, México
| | - Juventino J. García
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Interior, Ciudad Universitaria, Mexico City 04510, México
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142
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Dugan T, Bill E, MacLeod KC, Brennessel WW, Holland PL. Synthesis, spectroscopy, and hydrogen/deuterium exchange in high-spin iron(II) hydride complexes. Inorg Chem 2014; 53:2370-80. [PMID: 24555749 PMCID: PMC3993920 DOI: 10.1021/ic4013137] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Indexed: 01/05/2023]
Abstract
Very few hydride complexes are known in which the metals have a high-spin electronic configuration. We describe the characterization of several high-spin iron(II) hydride/deuteride isotopologues and their exchange reactions with one another and with H2/D2. Though the hydride/deuteride signal is not observable in NMR spectra, the choice of isotope has an influence on the chemical shifts of distant protons in the dimers through the paramagnetic isotope effect on chemical shift. This provides the first way to monitor the exchange of H and D in the bridging positions of these hydride complexes. The rate of exchange depends on the size of the supporting ligand, and this is consistent with the idea that H2/D2 exchange into the hydrides occurs through the dimeric complexes rather than through a transient monomer. The understanding of H/D exchange mechanisms in these high-spin iron hydride complexes may be relevant to postulated nitrogenase mechanisms.
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Affiliation(s)
- Thomas
R. Dugan
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Eckhard Bill
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, Mülheim
an der Ruhr, Germany
| | - K. Cory MacLeod
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Patrick L. Holland
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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143
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Zámostná L, Braun T, Braun B. SF and SC Activation of SF6and SF5Derivatives at Rhodium: Conversion of SF6into H2S. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201308254] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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144
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Zámostná L, Braun T, Braun B. SF and SC Activation of SF6and SF5Derivatives at Rhodium: Conversion of SF6into H2S. Angew Chem Int Ed Engl 2014; 53:2745-9. [DOI: 10.1002/anie.201308254] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Indexed: 11/08/2022]
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145
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Lu W, Gao J, Yang JK, Liu L, Zhao Y, Wu HC. Regioselective alkyl transfer from phosphonium ylides to functionalized polyfluoroarenes. Chem Sci 2014. [DOI: 10.1039/c4sc00221k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report an unprecedented alkyl transfer from phosphonium ylides to polyfluoroarenes in a highly regioselective manner.
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Affiliation(s)
- Wei Lu
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049, China
- School of Chemistry and Chemical Engineering
| | - Juan Gao
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049, China
| | - Jing-Kui Yang
- School of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049, China
| | - Lei Liu
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049, China
| | - Yuliang Zhao
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049, China
| | - Hai-Chen Wu
- Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049, China
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146
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147
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Gianetti TL, Bergman RG, Arnold J. Carbon–fluorine bond cleavage in fluoroarenes via a niobium(iii) imido complex: from stoichiometric to catalytic hydrodefluorination. Chem Sci 2014. [DOI: 10.1039/c4sc00006d] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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148
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Xu W, Sun H, Xiong Z, Li X. Acid-Promoted Selective Carbon–Fluorine Bond Activation and Functionalization of Hexafluoropropene by Nickel Complexes Supported with Phosphine Ligands. Organometallics 2013. [DOI: 10.1021/om400782v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Wengang Xu
- School
of Chemistry and Chemical Engineering, Key Laboratory of Special Functional
Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Hongjian Sun
- School
of Chemistry and Chemical Engineering, Key Laboratory of Special Functional
Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Zichang Xiong
- School
of Chemistry and Chemical Engineering, Key Laboratory of Special Functional
Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
| | - Xiaoyan Li
- School
of Chemistry and Chemical Engineering, Key Laboratory of Special Functional
Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, 250100 Jinan, People’s Republic of China
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149
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Liu C, Wang H, Xing X, Xu Y, Ma JA, Zhang B. Selective C4–F bond cleavage of pentafluorobenzene: synthesis of N-tetrafluoroarylated heterocyclic compounds. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.055] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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150
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Ni F, Lee CC, Hwang CS, Hu Y, Ribbe MW, McKenna CE. Reduction of Fluorinated Cyclopropene by Nitrogenase. J Am Chem Soc 2013; 135:10346-52. [DOI: 10.1021/ja3121058] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Feng Ni
- Department of Chemistry, University of Southern California, Los Angeles, California
90089-0744, United States
| | - Chi Chung Lee
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697-3900, United
States
| | - Candy S. Hwang
- Department of Chemistry, University of Southern California, Los Angeles, California
90089-0744, United States
| | - Yilin Hu
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697-3900, United
States
| | - Markus W. Ribbe
- Department of Molecular Biology and Biochemistry, University of California, Irvine, California 92697-3900, United
States
| | - Charles E. McKenna
- Department of Chemistry, University of Southern California, Los Angeles, California
90089-0744, United States
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