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Kaluarachchige Don UI, Palmer Z, Ward CL, Lord RL, Groysman S. Combining [Mo VIO 3] and [M 0(CO) 3] (M = Mo, Cr) Fragments within the Same Complex: Synthesis and Reactivity of the Single Oxo-Bridged Heterobimetallics Supported by Xanthene-Based Heterodinucleating Ligands. Inorg Chem 2023; 62:15063-15075. [PMID: 37677846 DOI: 10.1021/acs.inorgchem.3c01929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A functional model of Mo-Cu carbon monoxide dehydrogenase (CODH) enzyme requires the presence of an oxidant (metal-oxo) and a metal-bound carbonyl in close proximity. In this work, we report the synthesis, characterization, and reactivity of a heterobimetallic complex combining Mo(VI) trioxo with Mo(0) tricarbonyl. The formation of the heterobimetallic complex is facilitated by the xanthene-bridged heterodinucleating ligand containing a hard catecholate chelate and a soft iminopyridine chelate. A catechol-coordinated square-pyramidal [MoVIO3] fragment interacts directly with the iminopyridine-bound [Mo0(CO)3] fragment via a single (oxo) bridge, with the overall disposition being related to the proposed first step in the CODH mechanism, where square-pyramidal [MoVIO2S] interacts with the [Cu-CO] via a single sulfido bridge. Our attempt to obtain a sulfido-bridged analogue (using [MoO3S]2- precursor) led to a mixture of products possibly containing different (oxo and sulfido) bridges. Despite a direct interaction between Mo(VI) and Mo(0) segments, no internal redox is observed, with the high lying occupied MOs being mostly d-π orbitals at Mo0(CO)3 and the low lying unoccupied MOs being d-π orbitals at MoVIO3. Due to the overall rigid structure, the heterobimetallic complex was found to be stable up to 100 °C in DMF-d7 (based on 1H NMR). The decomposition of the complex above this temperature does not produce CO2 (based on gas chromatography), dissociating stable Mo(CO)3(DMF)3 instead (based on IR). We also synthesized and studied the reactivity of the Mo(VI)/Cr(0) analogue. While this complex demonstrated more facile decomposition, no CO2 production was observed. Density functional theory calculations suggest that the formation of [CO2]2- and its subsequent reductive elimination is endergonic in the present system, likely due to the stability of fac-Mo0(CO)3 and the relative nucleophilic character of the carbonyl carbon engendered by back donation from Mo(0). The calculations also indicate that the replacement of one oxo by sulfido (both terminal and bridging), replacement of catechol with dithiolene, and replacement of Mo(0) with Cr(0) does not affect significantly the energetics of the process, likely requiring the use a less stable and less π-basic CO anchor.
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Affiliation(s)
| | - Zsolt Palmer
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Cassandra L Ward
- Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Richard L Lord
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Stanislav Groysman
- Department of Chemistry, Wayne State University, 5101 Cass Ave. Detroit, Michigan 48202, United States
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2
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Alvarez MA, Casado-Ruano M, García ME, García-Vivó D, Ruiz MA. Reactions of the unsaturated methyl-bridged complexes [Mo2Cp2(μ-CH3)(μ-P Bu2)(CO)x] (x = 1, 2) towards transition metal carbonyls: convenient dehydrogenative route to heterometallic methylidyne-bridged clusters. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Alvarez MA, Casado-Ruano M, García ME, García-Vivó D, Ruiz MA. Dehydrogenation, Methyl Elimination and Insertion Reactions of the Agostic Methyl-Bridged Complex [Mo2
Cp2
(μ-κ1
:η2
-CH3
)(μ-Pt
Bu2
)(μ-CO)]. Chemistry 2018; 24:9504-9507. [DOI: 10.1002/chem.201801944] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Indexed: 11/08/2022]
Affiliation(s)
- M. Angeles Alvarez
- Departamento de Química Orgánica e Inorgánica/IUQOEM; Universidad de Oviedo; E-33071 Oviedo Spain
| | - Melodie Casado-Ruano
- Departamento de Química Orgánica e Inorgánica/IUQOEM; Universidad de Oviedo; E-33071 Oviedo Spain
| | - M. Esther García
- Departamento de Química Orgánica e Inorgánica/IUQOEM; Universidad de Oviedo; E-33071 Oviedo Spain
| | - Daniel García-Vivó
- Departamento de Química Orgánica e Inorgánica/IUQOEM; Universidad de Oviedo; E-33071 Oviedo Spain
| | - Miguel A. Ruiz
- Departamento de Química Orgánica e Inorgánica/IUQOEM; Universidad de Oviedo; E-33071 Oviedo Spain
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4
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Alvarez MA, Casado-Ruano M, García ME, García-Vivó D, Ruiz MA. Structural and Chemical Effects of the PtBu2 Bridge at Unsaturated Dimolybdenum Complexes Having Hydride and Hydrocarbyl Ligands. Inorg Chem 2017; 56:11336-11351. [DOI: 10.1021/acs.inorgchem.7b01773] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Angeles Alvarez
- Departamento de Química Orgánica
e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Melodie Casado-Ruano
- Departamento de Química Orgánica
e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento de Química Orgánica
e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Daniel García-Vivó
- Departamento de Química Orgánica
e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento de Química Orgánica
e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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5
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Alvarez MÁ, García ME, Menéndez S, Ruiz MA. Chalcogenoacyl-bridged derivatives of the unsaturated carbyne complex [Mo 2 ( η 5 -C 5 H 5 ) 2 ( μ -CPh)( μ -PCy 2 )(CO) 2 ]. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Curado N, Carrasco M, Campos J, Maya C, Rodríguez A, Ruiz E, Álvarez S, Carmona E. An Unsaturated Four-Coordinate Dimethyl Dimolybdenum Complex with a Molybdenum-Molybdenum Quadruple Bond. Chemistry 2016; 23:194-205. [DOI: 10.1002/chem.201604618] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Natalia Curado
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Mario Carrasco
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Celia Maya
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Amor Rodríguez
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Santiago Álvarez
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ); Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA); Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
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7
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Campos J, López-Serrano J, Peloso R, Carmona E. Methyl Complexes of the Transition Metals. Chemistry 2016; 22:6432-57. [PMID: 26991740 DOI: 10.1002/chem.201504483] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Indexed: 01/11/2023]
Abstract
Organometallic chemistry can be considered as a wide area of knowledge that combines concepts of classic organic chemistry, that is, based essentially on carbon, with molecular inorganic chemistry, especially with coordination compounds. Transition-metal methyl complexes probably represent the simplest and most fundamental way to view how these two major areas of chemistry combine and merge into novel species with intriguing features in terms of reactivity, structure, and bonding. Citing more than 500 bibliographic references, this review aims to offer a concise view of recent advances in the field of transition-metal complexes containing M-CH3 fragments. Taking into account the impressive amount of data that are continuously provided by organometallic chemists in this area, this review is mainly focused on results of the last five years. After a panoramic overview on M-CH3 compounds of Groups 3 to 11, which includes the most recent landmark findings in this area, two further sections are dedicated to methyl-bridged complexes and reactivity.
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Affiliation(s)
- Jesús Campos
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Riccardo Peloso
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
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8
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Alvarez MA, García ME, Menéndez S, Ruiz MA. Heterometallic clusters derived from the unsaturated carbyne-bridged dimolybdenum complexes [Mo 2 (η 5 -C 5 H 5 ) 2 (μ-CPh) (μ-PCy 2 ) (CO) x ] (x = 1, 2). J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.09.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Chowdhury MAH, Rajbangshi S, Karim M, Ghosh S, Kabir SE, Siddiquee TA, Nesterov VN, Richmond MG. Reactivity of [CpMo(CO)2]2 towards heterocyclic thiols: Synthesis, structure, and bonding in the sulfido-ligated cluster Cp3Mo3(μ-CO)2(μ-κ2-C7H4NS)(μ-S)(μ3-S). Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Liu FC, Chen HG, Lee GH. Trinuclear Zirconium Polyhydride ({Cp*Zr(BH3CH3)}(μ-H)2{Cp*Zr(BH3CH3)}(μ-H){Cp*Zr(BH3CH3)})(μ-κ2C,H:κ1C:κ2C,H-CHBH3) and Its Derivatives: Compounds Containing a Pentacoordinated Carbon Atom. Organometallics 2014. [DOI: 10.1021/om500773e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fu-Chen Liu
- Department
of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, ROC
| | - Heng-Guang Chen
- Department
of Chemistry, National Dong Hwa University, Hualien 974, Taiwan, ROC
| | - Gene-Hsiang Lee
- Department
of Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC
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11
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Alvarez MA, García ME, García-Vivó D, Lozano R, Ramos A, Ruiz MA. Mild P–P Bond Cleavage in the Methyldiphosphenyl Complex [Mo2Cp2(μ-PCy2)(μ-κ2:κ2-P2Me)(CO)2] To Give Novel Phosphide-Bridged Trinuclear Derivatives. Inorg Chem 2014; 53:11261-73. [DOI: 10.1021/ic501857f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- M. Angeles Alvarez
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Daniel García-Vivó
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Raquel Lozano
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Alberto Ramos
- Instituto Nacional del Carbón, Spanish Research Council for Scientific Research (CSIC), Francisco Pintado Fe 26, E-33011 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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12
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Alvarez MA, García ME, García-Vivó D, Martínez ME, Ramos A, Ruiz MA. Insertion, coupling and elimination processes in the reactions of the unsaturated alkyl-bridged complexes [Mo2(η5-C5H5)2(μ-CH2R)(μ-PCy2)(CO)2] (R = H, Ph) with isocyanides and secondary phosphines. Dalton Trans 2014; 43:7780-94. [DOI: 10.1039/c4dt00398e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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García-Vivó D, Ramos A, Ruiz MA. Cyclopentadienyl and related complexes of the group 6 elements having metal–metal triple bonds: Synthesis, structure, bonding and reactivity. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.03.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Alvarez MA, García ME, Ruiz MA, Toyos A, Vega MF. Heterometallic Derivatives of the Unsaturated Ditungsten Hydride [W2(η5-C5H5)2(H)(μ-PCy2)(CO)2]. Inorg Chem 2013; 52:7068-77. [DOI: 10.1021/ic400602y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- M. Angeles Alvarez
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Adrián Toyos
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Fernanda Vega
- Departamento
de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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15
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Herndon JW. The chemistry of the carbon–transition metal double and triple bond: Annual survey covering the year 2010. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Green JC, Green MLH, Parkin G. The occurrence and representation of three-centre two-electron bonds in covalent inorganic compounds. Chem Commun (Camb) 2012; 48:11481-503. [DOI: 10.1039/c2cc35304k] [Citation(s) in RCA: 222] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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17
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Alvarez MA, García ME, García-Vivó D, Martínez ME, Ruiz MA. Binuclear Carbyne and Ketenyl Derivatives of the Alkyl-Bridged Complexes [Mo2(η5-C5H5)2(μ-CH2R)(μ-PCy2)(CO)2] (R = H, Ph). Organometallics 2011. [DOI: 10.1021/om1011819] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Angeles Alvarez
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Daniel García-Vivó
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Eugenia Martínez
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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18
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Alvarez MA, García ME, González R, Ramos A, Ruiz MA. Synthesis and Decarbonylation Reactions of Diiron Cyclopentadienyl Complexes with Bent-Phosphinidene Bridges. Organometallics 2011. [DOI: 10.1021/om101125g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- M. Angeles Alvarez
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - M. Esther García
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Rocío González
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Alberto Ramos
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Miguel A. Ruiz
- Departamento de Química Orgánica e Inorgánica/IUQOEM, Universidad de Oviedo, E-33071 Oviedo, Spain
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19
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Ojo WS, McGrady JE, Pétillon FY, Schollhammer P, Talarmin J. Thermal Generation and Structures of the Unsaturated Doubly Bridged Complex [Mo2Cp2Cl2(μ-SMe)2] and Its Quadruply Bridged Isomer [Mo2Cp2(μ-Cl)2(μ-SMe)2]. Organometallics 2011. [DOI: 10.1021/om101061y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Wilfried-Solo Ojo
- Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”,CS 93837, 29238 Brest-Cedex 3, France
| | - John E. McGrady
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, U.K
| | - François Y. Pétillon
- Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”,CS 93837, 29238 Brest-Cedex 3, France
| | - Philippe Schollhammer
- Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”,CS 93837, 29238 Brest-Cedex 3, France
| | - Jean Talarmin
- Université de Brest, CNRS, UMR 6521, “Chimie, Electrochimie Moléculaires et Chimie Analytique”,CS 93837, 29238 Brest-Cedex 3, France
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