1
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Chatelain L, Arrigoni F, Schollhammer P, Zampella G. C-Cl Bond Activation at Rotated vs Unrotated Dinuclear Site Related to [FeFe]-Hydrogenases. Inorg Chem 2023; 62:20913-20918. [PMID: 38047903 DOI: 10.1021/acs.inorgchem.3c03481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The novel dinuclear complex related to the [FeFe]-hydrogenases active site, [Fe2(μ-pdt)(κ2-dmpe)2(CO)2] (1), is highly reactive toward chlorinated compounds CHxCl4-x (x = 1, 2) affording selectively terminal or bridging chloro diiron isomers through a C-Cl bond activation. DFT calculations suggest a cooperative mechanism involving a formal concerted regioselective chloronium transfer depending on the unrotated or rotated conformation of two isomers of 1.
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Affiliation(s)
- Lucile Chatelain
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, 6 Avenue Victor le Gorgeu, CS93837, Brest-Cedex 3, 29238 Brest, France
| | - Federica Arrigoni
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
| | - Philippe Schollhammer
- UMR CNRS 6521 Chimie, Electrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, 6 Avenue Victor le Gorgeu, CS93837, Brest-Cedex 3, 29238 Brest, France
| | - Giuseppe Zampella
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Piazza della Scienza 2, 20126 Milan, Italy
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2
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Dinuclear Reactivity of One Metal Exalted by the Second One. TOP ORGANOMETAL CHEM 2023. [DOI: 10.1007/3418_2022_80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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3
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Longcake A, Lees MR, Senn MS, Chaplin AB. Oxidative Addition of C–Cl Bonds to a Rh(PONOP) Pincer Complex. Organometallics 2022; 41:3557-3567. [DOI: 10.1021/acs.organomet.2c00400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Alexandra Longcake
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Martin R. Lees
- Department of Physics, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Mark S. Senn
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
| | - Adrian B. Chaplin
- Department of Chemistry, University of Warwick, Gibbet Hill Road, CoventryCV4 7AL, U.K
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4
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de las Heras L, Esteruelas MA, Oliván M, Oñate E. C-Cl Oxidative Addition and C-C Reductive Elimination Reactions in the Context of the Rhodium-Promoted Direct Arylation. Organometallics 2022; 41:716-732. [PMID: 35368715 PMCID: PMC8966374 DOI: 10.1021/acs.organomet.1c00643] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Indexed: 01/09/2023]
Abstract
A cycle of stoichiometric elemental reactions defining the direct arylation promoted by a redox-pair Rh(I)-Rh(III) is reported. Starting from the rhodium(I)-aryl complex RhPh{κ3-P,O,P-[xant(PiPr2)2]} (xant(PiPr2)2 = 9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene), the reactions include C-Cl oxidative addition of organic chlorides, halide abstraction from the resulting six-coordinate rhodium(III) derivatives, C-C reductive coupling between the initial aryl ligand and the added organic group, oxidative addition of a C-H bond of a new arene, and deprotonation of the generated hydride-rhodium(III)-aryl species to form a new rhodium(I)-aryl derivative. In this context, the kinetics of the oxidative additions of 2-chloropyridine, chlorobenzene, benzyl chloride, and dichloromethane to RhPh{κ3-P,O,P-[xant(PiPr2)2]} and the C-C reductive eliminations of biphenyl and benzylbenzene from [RhPh2{κ3-P,O,P-[xant(PiPr2)2]}]BF4 and [RhPh(CH2Ph){κ3-P,O,P-[xant(PiPr2)2]}]BF4, respectively, have been studied. The oxidative additions generally involve the cis addition of the C-Cl bond of the organic chloride to the rhodium(I) complex, being kinetically controlled by the C-Cl bond dissociation energy; the weakest C-Cl bond is faster added. The C-C reductive elimination is kinetically governed by the dissociation energy of the formed bond. The C(sp3)-C(sp2) coupling to give benzylbenzene is faster than the C(sp2)-C(sp2) bond formation to afford biphenyl. In spite of that a most demanding orientation requirement is needed for the C(sp3)-C(sp2) coupling than for the C(sp2)-C(sp2) bond formation, the energetic effort for the pregeneration of the C(sp3)-C(sp2) bond is lower. As a result, the weakest C-C bond is formed faster.
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Affiliation(s)
- Laura
A. de las Heras
- Departamento de Química Inorgánica—Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH)—Centro de Innovación en Química Avanzada
(ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica—Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH)—Centro de Innovación en Química Avanzada
(ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica—Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH)—Centro de Innovación en Química Avanzada
(ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica—Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH)—Centro de Innovación en Química Avanzada
(ORFEO-CINQA), Universidad de Zaragoza—CSIC, 50009 Zaragoza, Spain
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5
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Tinnermann H, Sung S, Csókás D, Toh ZH, Fraser C, Young RD. Alkali Metal Adducts of an Iron(0) Complex and Their Synergistic FLP-Type Activation of Aliphatic C-X Bonds. J Am Chem Soc 2021; 143:10700-10708. [PMID: 34251818 DOI: 10.1021/jacs.1c04815] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report the formation and full characterization of weak adducts between Li+ and Na+ cations and a neutral iron(0) complex, [Fe(CO)3(PMe3)2] (1), supported by weakly coordinating [BArF20] anions, [1·M][BArF20] (M = Li, Na). The adducts are found to synergistically activate aliphatic C-X bonds (X = F, Cl, Br, I, OMs, OTf), leading to the formation of iron(II) organyl compounds of the type [FeR(CO)3(PMe3)2][BArF20], of which several were isolated and fully characterized. Stoichiometric reactions with the resulting iron(II) organyl compounds show that this system can be utilized for homocoupling and cross-coupling reactions and the formation of new C-E bonds (E = C, H, O, N, S). Further, we utilize [1·M][BArF20] as a catalyst in a simple hydrodehalogenation reaction under mild conditions to showcase its potential use in catalytic reactions. Finally, the mechanism of activation is probed using DFT and kinetic experiments that reveal that the alkali metal and iron(0) center cooperate to cleave C-X via a mechanism closely related to intramolecular FLP activation.
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Affiliation(s)
- Hendrik Tinnermann
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Simon Sung
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Dániel Csókás
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Zhi Hao Toh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Craig Fraser
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Rowan D Young
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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Wei N, Yang D, Zhao J, Mei T, Zhang Y, Wang B, Qu J. Structure and Methylene Transfer Reactivity of Thiolate-Bridged Dichromium Methylene Complexes Derived from Dihalomethane via Cleavage of Two Carbon–Halogen Bonds. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Nianmin Wei
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Jinfeng Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Tao Mei
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Yixin Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, People’s Republic of China
- State Key Laboratory of Bioreactor Engineering, Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
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7
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Curto SG, de las Heras LA, Esteruelas MA, Oliván M, Oñate E. C(sp3)–Cl Bond Activation Promoted by a POP-Pincer Rhodium(I) Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00409] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sheila G. Curto
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Laura A. de las Heras
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)-Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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8
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Activation, Deactivation and Reversibility Phenomena in Homogeneous Catalysis: A Showcase based on the Chemistry of Rhodium/Phosphine Catalysts. Catalysts 2019. [DOI: 10.3390/catal9070582] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the present work, the rich chemistry of rhodium/phosphine complexes, which are applied as homogeneous catalysts to promote a wide range of chemical transformations, has been used to showcase how the in situ generation of precatalysts, the conversion of precatalysts into the actually active species, as well as the reaction of the catalyst itself with other components in the reaction medium (substrates, solvents, additives) can lead to a number of deactivation phenomena and thus impact the efficiency of a catalytic process. Such phenomena may go unnoticed or may be overlooked, thus preventing the full understanding of the catalytic process which is a prerequisite for its optimization. Based on recent findings both from others and the authors’ laboratory concerning the chemistry of rhodium/diphosphine complexes, some guidelines are provided for the optimal generation of the catalytic active species from a suitable rhodium precursor and the diphosphine of interest; for the choice of the best solvent to prevent aggregation of coordinatively unsaturated metal fragments and sequestration of the active metal through too strong metal–solvent interactions; for preventing catalyst poisoning due to irreversible reaction with the product of the catalytic process or impurities present in the substrate.
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9
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Su L, Yang D, Zhang Y, Wang B, Qu J. Methylene insertion into an Fe 2S 2 cluster: formation of a thiolate-bridged diiron complex containing an Fe-CH 2-S moiety. Chem Commun (Camb) 2018; 54:13119-13122. [PMID: 30398494 DOI: 10.1039/c8cc07418f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Reduction of a thiolate-bridged FeIIFeIII complex leads to the cleavage of an Fe-S bond by the insertion of the methylene unit from CH2Cl2 to give a neutral FeIIFeIII complex with a novel Fe-CH2-S fragment. The structural and electrochemical differences of the alkylated and the non-alkylated Fe2S2 complexes are also examined.
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Affiliation(s)
- Linan Su
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, P. R. China.
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10
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Mannu A, Drexler HJ, Thede R, Ferro M, Baumann W, Rüger J, Heller D. Oxidative addition of CH2Cl2 to neutral dimeric rhodium diphosphine complexes. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Thiel I, Horstmann M, Jungk P, Keller S, Fischer F, Drexler HJ, Heller D, Hapke M. Insight into the Activation of In Situ Generated Chiral Rh I Catalysts and Their Application in Cyclotrimerizations. Chemistry 2017; 23:17048-17057. [PMID: 28902959 DOI: 10.1002/chem.201703198] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 12/16/2022]
Abstract
We report a detailed study concerning the efficient generation of highly active chiral rhodium complexes of the general structure [Rh(diphosphine)(solvent)2 ]+ as well as their exemplary successful utilization as catalysts for cyclotrimerizations. Such solvent complexes could likewise be prepared from novel ammonia complexes of the type [Rh(diphosphine)(NH3 )2 ]+ . A valuable, feasible approach to generate novel chiral RhI complexes was found by in situ generation from Wilkinson's catalyst [RhCl(PPh3 )3 ] with chiral P,N ligands. The generated catalysts led to moderate to good enantioselectivities and excellent yields in the cyclotrimerizations of triynes, showcasing their usefulness in the synthesis of axially chiral benzene derivatives.
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Affiliation(s)
- Indre Thiel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Moritz Horstmann
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Phillip Jungk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Sonja Keller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Fabian Fischer
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Hans-Joachim Drexler
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Detlef Heller
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Marko Hapke
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059, Rostock, Germany.,Johannes Kepler Universität Linz, Institut für Katalyse (INCA), Altenberger Straße 69, 4040, Linz, Austria
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12
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Oyama D, Yamanaka T, Abe R, Takase T. Ruthenium complexes bearing a tridentate polypyridyl ligand with non-coordinating donor atoms: Construction of a specific coordination environment involving noncovalent interactions. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Chang KC, Huang CJ, Chang YH, Wu ZH, Kuo TS, Hsu HF. Reactivity of a Fe(III)-Bound Methoxide Supported with a Tris(thiolato)phosphine Ligand: Activation of C-Cl Bond in CH2Cl2 by Nucleophilic Attack of a Fe(III)-OCH3 Moiety. Inorg Chem 2015; 55:566-72. [PMID: 26699874 DOI: 10.1021/acs.inorgchem.5b02135] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two mononuclear nonheme Fe(III) complexes, [PPh4][Fe(III)(PS3″)(OCH3)] (1) and [PPh4][Fe(III)(PS3″)(Cl)] (2), supported by a tris(benzenethiolato)phosphine derivative PS3″ (PS3″ = P(C6H3-3-Me3Si-2-S)3(3-)) have been synthesized and characterized. The structures resolved from X-ray crystallography show that Fe(III) centers in both complexes adopt distorted trigonal-bipyramidal geometry with a methoxide or a chloride binding in the axial position. The magnetic data for both are consistent with intermediate-spin Fe(III) centers with a C3 symmetry (S = 3/2 ground state). The bound methoxide in 1 is labile and can be replaced by a CH3CN molecule. The forming Fe(III)-CH3CN species can be further reduced by cobaltcene quantitatively to a stable Fe(II)-CH3CN complex, [Fe(PS3″)(CH3CN)](-). One-electron oxidation of 2 by ferrocenium gave a Fe(IV) analogue, [Fe(IV)(PS3″)(Cl)]. Importantly, the Fe(III)-OCH3 moiety in complex 1 acts as a strong nucleophile that activates the C-Cl bond in CH2Cl2, leading to the formation of complex 2 quantitatively. Complex 1 also reacts with other electrophiles, benzyl chloride and benzyl bromide, to generate Fe(III)-X species (X = Cl or Br). The reactions were investigated and monitored by UV-vis-NIR, NMR, and ESI-MS spectroscopies.
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Affiliation(s)
- Kai-Chun Chang
- Department of Chemistry, National Cheng Kung University , Tainan 701, Taiwan
| | - Ching-Ju Huang
- Department of Chemistry, National Cheng Kung University , Tainan 701, Taiwan
| | - Ya-Ho Chang
- Department of Chemistry, National Cheng Kung University , Tainan 701, Taiwan
| | - Zong-Han Wu
- Department of Chemistry, National Cheng Kung University , Tainan 701, Taiwan
| | - Ting-Shen Kuo
- Department of Chemistry, National Taiwan Normal University , Taipei 116, Taiwan
| | - Hua-Fen Hsu
- Department of Chemistry, National Cheng Kung University , Tainan 701, Taiwan
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14
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Ghisolfi A, Condello F, Fliedel C, Rosa V, Braunstein P. Facile and Room-Temperature Activation of Csp3–Cl Bonds by Cheap and Air-Stable Nickel(II) Complexes of (N-Thioether) DPPA-Type Ligands. Organometallics 2014. [DOI: 10.1021/om501004d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Alessio Ghisolfi
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Francesca Condello
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Christophe Fliedel
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Vitor Rosa
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Pierre Braunstein
- Laboratoire de Chimie de
Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 Rue Blaise Pascal, 67081 Strasbourg Cedex, France
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15
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Holzhacker C, Calhorda MJ, Gil A, Carvalho MD, Ferreira LP, Stöger B, Mereiter K, Weil M, Müller D, Weinberger P, Pittenauer E, Allmaier G, Kirchner K. Six-coordinate high-spin iron(ii) complexes with bidentate PN ligands based on 2-aminopyridine - new Fe(ii) spin crossover systems. Dalton Trans 2014; 43:11152-64. [PMID: 24695811 DOI: 10.1039/c4dt00186a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Several new octahedral iron(ii) complexes of the type [Fe(PN(R)-Ph)2X2] (X = Cl, Br; R = H, Me) containing bidentate PN(R)-Ph (R = H, Me) (1a,b) ligands based on 2-aminopyridine were prepared. (57)Fe Mössbauer spectroscopy and magnetization studies confirmed in all cases their high spin nature at room temperature with magnetic moments very close to 4.9μB reflecting the expected four unpaired d-electrons in all these compounds. While in the case of the PN(H)-Ph ligand an S = 2 to S = 0 spin crossover was observed at low temperatures, complexes with the N-methylated analog PN(Me)-Ph retain an S = 2 spin state also at low temperatures. Thus, [Fe(PN(H)-Ph)2X2] (2a,3a) and [Fe(PN(Me)-Ph)2X2] (2b,3b) adopt different geometries. In the first case a cis-Cl,P,N-arrangement seems to be most likely, as supported by various experimental data derived from (57)Fe Mössbauer spectroscopy, SQUID magnetometry, UV/Vis, Raman, and ESI-MS as well as DFT and TDDFT calculations, while in the case of the PN(Me)-Ph ligand a trans-Cl,P,N-configuration is adopted. The latter is also confirmed by X-ray crystallography. In contrast to [Fe(PN(Me)-Ph)2X2] (2b,3b), [Fe(PN(H)-Ph)2X2] (2a,3a) is labile and undergoes rearrangement reactions. In CH3OH, the diamagnetic dicationic complex [Fe(PN(H)-Ph)3](2+) (5) is formed via the intermediacy of cis-P,N-[Fe(κ(2)-P,N-PN(H)-Ph)2(κ(1)-P-PN(H)-Ph)(X)](+) (4a,b) where one PN ligand is coordinated in a κ(1)-P-fashion. In CH3CN the diamagnetic dicationic complex cis-N,P,N-[Fe(PN(H)-Ph)2(CH3CN)2](2+) (6) is formed as a major isomer where the two halide ligands are replaced by CH3CN.
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Affiliation(s)
- Christian Holzhacker
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
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16
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Gruber S, Neuburger M, Pfaltz A. Characterization and Reactivity Studies of Dinuclear Iridium Hydride Complexes Prepared from Iridium Catalysts with N,P and C,N Ligands under Hydrogenation Conditions. Organometallics 2013. [DOI: 10.1021/om4007467] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Gruber
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel,
Switzerland
| | - Markus Neuburger
- Laboratory
for Chemical Crystallography, University of Basel, Spitalstrasse 51, 4056 Basel,
Switzerland
| | - Andreas Pfaltz
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056 Basel,
Switzerland
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17
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de Petris G, Troiani A, Rosi M, Angelini G, Ursini O. Selective Activation of CCl and CF Bonds by SO.+Radical Cations: An Experimental and Computational Study. Chempluschem 2013; 78:1065-1072. [DOI: 10.1002/cplu.201300162] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Indexed: 11/06/2022]
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Algarra AG, Braunstein P, Macgregor SA. Computational study of the double C–Cl bond activation of dichloromethane and phosphinealkylation at [CoCl(PR3)3]. Dalton Trans 2013; 42:4208-17. [PMID: 23247541 DOI: 10.1039/c2dt32272b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Andrés G Algarra
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Perkin Building, Heriot-Watt University, Edinburgh EH14 4AS, UK
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19
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Gartia Y, Biswas A, Stadler M, Nasini UB, Ghosh A. Cross coupling reactions of multiple CCl bonds of polychlorinated solvents with Grignard reagent using a pincer nickel complex. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Gartia Y, Pulla S, Ramidi P, Farris CC, Nima Z, Jones DE, Biris AS, Ghosh A. A Novel Iron Complex for Cross-Coupling Reactions of Multiple C–Cl Bonds in Polychlorinated Solvents with Grignard Reagents. Catal Letters 2012. [DOI: 10.1007/s10562-012-0913-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Abo-Amer A, McCready MS, Zhang F, Puddephatt RJ. The role of solvent in organometallic chemistry — Oxidative addition with dichloromethane or chloroform. CAN J CHEM 2012. [DOI: 10.1139/v11-096] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Dimethylplatinum(II) complexes [PtMe2(NN)], with NN = diimine ligand, can react with dichloromethane or chloroform solvent to give the corresponding organoplatinum(IV) complexes [PtClMe2(CH2Cl)(NN)] or [PtClMe2(CHCl2)(NN)], respectively. The products can exist in isomeric forms, corresponding to products of cis or trans oxidative addition. The structures of three dichloromethane adducts and one chloroform adduct are reported.
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Affiliation(s)
- Anwar Abo-Amer
- Department of Chemistry, Al al-Bayt University, Al-Mafraq, Jordan
| | - Matthew S. McCready
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
| | - Fenbao Zhang
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
| | - Richard J. Puddephatt
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
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22
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Jiang Y, Blacque O, Fox T, Frech CM, Berke H. Facile synthetic access to rhenium(II) complexes: activation of carbon-bromine bonds by single-electron transfer. Chemistry 2010; 16:2240-9. [PMID: 20066700 DOI: 10.1002/chem.200902600] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The five-coordinated Re(I) hydride complexes [Re(Br)(H)(NO)(PR(3))(2)] (R=Cy 1 a, iPr 1 b) were reacted with benzylbromide, thereby affording the 17-electron mononuclear Re(II) hydride complexes [Re(Br)(2)(H)(NO)(PR(3))(2)] (R=Cy 3 a, iPr 3 b), which were characterized by EPR, cyclic voltammetry, and magnetic susceptibility measurements. In the case of dibromomethane or bromoform, the reaction of 1 afforded Re(II) hydrides 3 in addition to Re(I) carbene hydrides [Re(=CHR(1))(Br)(H)(NO)(PR(3))(2)] (R(1)=H 4, Br 5; R=Cy a, iPr b) in which the hydride ligand is positioned cis to the carbene ligand. For comparison, the dihydrogen Re(I) dibromide complexes [Re(Br)(2)(NO)(PR(3))(2)(eta(2)-H(2))] (R=Cy 2 a, iPr 2 b) were reacted with allyl- or benzylbromide, thereby affording the monophosphine Re(II) complex salts [R(3)PCH(2)R'][Re(Br)(4)(NO)(PR(3))] (R'=-CH=CH(2) 6, Ph 7). The reduction of Re(II) complexes has also been examined. Complex 3 a or 3 b can be reduced by zinc to afford 1 a or 1 b in high yield. Under catalytic conditions, this reaction enables homocoupling of benzylbromide (turnover frequency (TOF): 3 a 150, 3 b 134 h(-1)) or allylbromide (TOF: 3 a 575, 3 b 562 h(-1)). The reaction of 6 a and 6 b with zinc in acetonitrile affords in good yields the monophosphine Re(I) complexes [Re(Br)(2)(NO)(MeCN)(2)(PR(3))] (R=Cy 8 a, iPr 8 b), which showed high catalytic activity toward highly selective dehydrogenative silylation of styrenes (maximum TOF of 61 h(-1)). Single-electron transfer (SET) mechanisms were proposed for all these transformations. The molecular structures of 3 a, 6 a, 6 b, 7 a, 7 b, and 8 a were established by single-crystal X-ray diffraction studies.
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Affiliation(s)
- Yanfeng Jiang
- Anorganisch-Chemisches Institut, Universität Zürich, Winterthurerstrasse 190, 8037 Zürich, Switzerland
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23
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Baker R, Hashem E, Motevalli M, Ogilvie H, Walshe A. The Coupling of Pyridine and Dichloromethane Mediated by UO2Cl2. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.200900342] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Blank B, Kempe R. Catalytic Alkylation of Methyl-N-Heteroaromatics with Alcohols. J Am Chem Soc 2010; 132:924-5. [DOI: 10.1021/ja9095413] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benoît Blank
- Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Rhett Kempe
- Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
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25
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Ojo WS, Pétillon FY, Schollhammer P, Talarmin J. Carbon−Sulfur and Carbon−Halogen Bond Cleavage of Acyclic or Cyclic Thioethers, Thiophenes, and Dihaloalkanes with the Trithiolato-Bridged Cation [Mo2Cp2(μ-SMe)3(MeCN)2]+. Organometallics 2009. [DOI: 10.1021/om900901s] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wilfried-Solo Ojo
- Université Européenne de Bretagne, Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”, ISSTB, CS 93837, 29238 Brest-Cedex 3, France
| | - François Y. Pétillon
- Université Européenne de Bretagne, Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”, ISSTB, CS 93837, 29238 Brest-Cedex 3, France
| | - P. Schollhammer
- Université Européenne de Bretagne, Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”, ISSTB, CS 93837, 29238 Brest-Cedex 3, France
| | - Jean Talarmin
- Université Européenne de Bretagne, Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”, ISSTB, CS 93837, 29238 Brest-Cedex 3, France
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26
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Blank B, Michlik S, Kempe R. Synthesis of Selectively Mono-N-Arylated Aliphatic DiaminesviaIridium-Catalyzed Amine Alkylation. Adv Synth Catal 2009. [DOI: 10.1002/adsc.200900548] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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