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Curto SG, de las Heras LA, Esteruelas MA, Oliván M, Oñate E, Vélez A. Reactions of POP-pincer rhodium(I)-aryl complexes with small molecules: coordination flexibility of the ether diphosphine. CAN J CHEM 2021. [DOI: 10.1139/cjc-2020-0061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reactions of the aryl complexes Rh(aryl){κ3-P,O,P-[xant(PiPr2)2]} (1; aryl = 3,5-Me2C6H3 (a), C6H5 (b), 3,5-Cl2C6H3 (c), 3-FC6H4 (d); xant(PiPr2)2 = 9,9-dimethyl-4,5-bis-(diisopropylphosphino)xanthene) with O2, CO, and MeO2CC≡CCO2Me have been performed. Under 1 atm of O2, the pentane solutions of complexes 1 afford the dinuclear peroxide derivatives [Rh(aryl){κ2-P,P-xant(PiPr2)2}]2(μ-O2)2 (2a–2d) as yellow solids. In solution, these species are unstable. In dichloromethane, at room temperature, they are transformed into the dioxygen adducts Rh(aryl)(η2-O2){κ3-P,O,P-[xant(PiPr2)2]} (3a–3d), as a result of the rupture of the double peroxide bridge and the reduction of the metal center. Complex 3b decomposes in benzene, at 50 °C, to give diphosphine oxide, phenol, and biphenyl. Complexes 1 react with CO to give the square-planar mono carbonyl derivatives Rh(aryl)(CO){κ2-P,P-[xant(PiPr2)2]} (4a–4d), which under carbon monoxide atmosphere evolve to benzoyl species Rh{C(O)aryl}(CO){κ2-P,P-[xant(PiPr2)2]} (5a–5d), resulting from the migratory insertion of CO into the Rh-aryl bond and the coordination of a second CO molecule. The transformation is reversible; under vacuum, complexes 5 regenerate the precursors 4. The addition of the activated alkyne to complexes 1b and 1d initially leads to the π-alkyne intermediates Rh(aryl){η2-C(CO2Me)≡C(CO2Me)}{κ3-P,O,P-[xant(PiPr2)2]} (6b, 6d), which evolve to the alkenyl derivatives Rh{(E)-C(CO2Me)=C(CO2Me)aryl}{κ3-P,O,P-[xant(PiPr2)2]} (7b, 7d). The diphosphine adapts its coordination mode to the stability requirements of the different complexes, coordinating cis-κ2-P,P in complexes 2, fac-κ3-P,O,P in compounds 3, trans-κ2-P,P in the mono carbonyl derivatives 4 and 5, and mer-κ3-P,O,P in products 6 and 7.
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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
- 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
- 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
- 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
- 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
- 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
| | - Andrea Vélez
- 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
- 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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2
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Fernández-Alvarez FJ, Polo V, García-Orduña P, Lahoz FJ, Pérez-Torrente JJ, Oro LA, Lalrempuia R. Synthesis and reactivity at the Ir- MeTpm platform: from κ 1-N coordination to κ 3-N-based organometallic chemistry. Dalton Trans 2019; 48:6455-6463. [PMID: 30924485 DOI: 10.1039/c9dt00703b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of [Ir(μ-Cl)(COE)2]2 (COE = cis-cyclooctene) with tris(3,5-dimethylpyrazol-1-yl)methane (MeTpm) affords [IrCl(κ1-N-MeTpm)(COD)] (1) (COD = 1,5-cyclooctadiene). The formation of 1 implies the transfer dehydrogenation of a COE ligand to give COD and COA (cyclooctane). A mechanistic proposal based on DFT calculations that explains this iridium promoted process has been disclosed. Additionally, reactivity studies have allowed the preparation and characterization, including determination of the molecular structures of a number of iridium complexes with the MeTpm ligand in κ1, κ2 or κ3-N coordination modes. Moreover, the first example of an Ir-cyclooctyl complex featuring hydride and carbonyl ligands, whose solid state structure has been determined by X-ray diffraction methods, is reported.
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Affiliation(s)
- Francisco J Fernández-Alvarez
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento de Química Física-Instituto de Biocomputación y Física de Sistemas Complejos (BIFI), Universidad de Zaragoza, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Fernando J Lahoz
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Jesús J Pérez-Torrente
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Luis A Oro
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain
| | - Ralte Lalrempuia
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009, Zaragoza, Spain and School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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3
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Uncoordination mode of к0-Janus scorpionate with La(III) and Ce(III) complexes: Synthesis, characterization, thermolysis and crystal structure determination. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.08.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Yuwen J, Brennessel WW, Jones WD. Coordination or Oxidative Addition? Activation of N–H with [Tp′Rh(PMe3)]. Inorg Chem 2018; 58:557-566. [DOI: 10.1021/acs.inorgchem.8b02752] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Yuwen
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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5
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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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6
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Romero N, Vendier L, Dinoi C, Etienne M. Highly fluorinated hydrotris(indazolyl)borate calcium complexes: the structure and reactivity heavily depend on the ligand's electronic properties. Dalton Trans 2014; 43:10114-9. [DOI: 10.1039/c4dt00884g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Bellows SM, Cundari TR, Holland PL. Spin Crossover during β-Hydride Elimination in High-Spin Iron(II)– and Cobalt(II)–Alkyl Complexes. Organometallics 2013. [DOI: 10.1021/om400325x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Sarina M. Bellows
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Thomas R. Cundari
- Department of Chemistry and CaSCAM, University of North Texas, Denton, Texas 76203, United States
| | - Patrick L. Holland
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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8
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Rivers JH, Jones RA. Synthesis and structures of Co bis-trifluoromethylpyrazolate complexes. Dalton Trans 2013; 42:12898-907. [DOI: 10.1039/c3dt50758k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Penner A, Braun T. Rhodium and Iridium Complexes with α‐Diketimine Ligands: Oxidative Addition of H
2
and O
2. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100135] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anna Penner
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
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10
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Different coordination modes of an aryl-substituted hydrotris(pyrazolyl)borate ligand in rhodium and iridium complexes. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.12.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Meier G, Braun T. A Rhodium Peroxido Complex in Mono-, Di-, and Peroxygenation Reactions. Angew Chem Int Ed Engl 2011; 50:3280-4. [DOI: 10.1002/anie.201007315] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Indexed: 11/08/2022]
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12
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Meier G, Braun T. A Rhodium Peroxido Complex in Mono-, Di-, and Peroxygenation Reactions. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007315] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Kumar M, Papish ET, Zeller M, Hunter AD. Zinc complexes of TtzR,Me with O and S donors reveal differences between Tp and Ttz ligands: acid stability and binding to H or an additional metal (TtzR,Me = tris(3-R-5-methyl-1,2,4-triazolyl)borate; R = Ph, tBu). Dalton Trans 2011; 40:7517-33. [DOI: 10.1039/c1dt10429b] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Rivers JH, Jones RA. Synthesis and structures of the homoleptic cations [M(PMe3)5]+ (M = Rh, Ir). Chem Commun (Camb) 2010; 46:4300-2. [PMID: 20473422 DOI: 10.1039/c0cc00892c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The homoleptic cations [M(PMe(3))(5)](+) (M = Rh, Ir) are formed in high yield from reactions of 16 electron 4 coordinate precursors, such as [Rh(PMe(3))(4)](+), with excess neat PMe(3) at 80 degrees C.
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Affiliation(s)
- Joseph H Rivers
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165, USA
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15
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Tanabe T, Brennessel WW, Clot E, Eisenstein O, Jones WD. Synthesis, structure, and reductive elimination in the series Tp′Rh(PR3)(ArF)H; Determination of rhodium–carbon bond energies of fluoroaryl substituents. Dalton Trans 2010; 39:10495-509. [DOI: 10.1039/c0dt00157k] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Penner A, Schröder T, Braun T, Ziemer B. Synthesis, Structure, and Reactivity of Rhodium Bipyridine Compounds: Formation of a Rh
II
Hydrido Cluster and a Rh
III
Peroxido Complex. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900531] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anna Penner
- Institut für Chemie, Humboldt‐Universität zu Berlin, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
| | - Tobias Schröder
- Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501 Bielefeld, Germany
| | - Thomas Braun
- Institut für Chemie, Humboldt‐Universität zu Berlin, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
| | - Burkhard Ziemer
- Institut für Chemie, Humboldt‐Universität zu Berlin, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
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17
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Tris(pyrazol-1-yl)borate and tris(pyrazol-1-yl)methane: A DFT study of their different binding capability toward Ag(I) and Cu(I) cations. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Rhodium and iridium olefin complexes with bulky cyclopentadienyl and hydrotris(pyrazolyl)borate ligands. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Casarin M, Pandolfo L, Vittadini A. Carbonyl copper(i) complexes with hydrotris(1,2,4-triazolyl)borate, hydrotris(pyrazolyl)borate, and tris(pyrazolyl)methaneligands: a DFT study. Phys Chem Chem Phys 2009; 11:94-6. [DOI: 10.1039/b815095h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Crossley IR. The Organometallic Chemistry of Group 9 Poly(pyrazolyl)borate Complexes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2008. [DOI: 10.1016/s0065-3055(07)56004-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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21
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Camerano JA, Casado MA, Ciriano MA, Tejel C, Oro LA. Coordination features of a hybrid scorpionate/phosphane ligand exemplified with Iridium. Chemistry 2007; 14:1897-905. [PMID: 18064622 DOI: 10.1002/chem.200701209] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Although the pentacoordinated complex [Ir{(allyl)B(CH(2)PPh(2))(pz)(2)}(cod)] (1; pz=pyrazolyl, cod=1,5-cyclooctadiene), isolated from the reaction of [{Ir(mu-Cl)(cod)}(2)] with [Li(tmen)][B(allyl)(CH(2)PPh(2))- (pz)(2)] (tmen=N,N,N',N'-tetramethylethane-1,2-diamine), shows behavior similar to that of the related hydridotris(pyrazolyl)borate complex, the carbonyl derivatives behave in a quite different way. On carbonylation of 1, the metal--metal-bonded complex [(Ir{(allyl)B(CH(2)PPh(2))(pz)(2)}CO)(2)(mu-CO)] (2) that results has a single ketonic carbonyl bridge. This bridging carbonyl is labile such that upon treatment of 2 with PMe(3) the pentacoordinated Ir(I) complex [Ir(CO){(pz)B(eta(2)-CH(2)CH=CH(2))(CH(2)PPh(2))(pz)}(PMe(3))] (3) was isolated. Complex 3 shows a unique fac coordination of the hybrid ligand with the allyl group eta(2)-bonded to the metal in the equatorial plane of a distorted trigonal bipyramid with one pyrazolate group remaining uncoordinated. This unusual feature can be rationalized on the basis of the electron-rich nature of the metal center. The related complex [Ir(CO){(pz)B(eta(2)-CH(2)CH=CH(2))(CH(2)PPh(2))(pz)}(PPh(3))] (4) was found to exist in solution as a temperature-dependent equilibrium between the cis-pentacoordinated and trans square planar isomers with respect to the phosphorus donor atoms. Protonation of 3 with different acids is selective at the iridium center and gives the cationic hydrides [Ir{(allyl)B(CH(2)PPh(2))(pz)(2)}(CO)H(PMe(3))]X (X=BF(4) (5), MeCO(2) (6), and Cl (7)). Complex 7 further reacts with HCl to generate the unexpected product [Ir(CO)Cl{(Hpz)B(CH(2)PPh(2))(pz)CH(2)CH(Me)}(PMe(3))]Cl (9; Hpz=protonated pyrazolyl group) formed by the insertion of the hydride into the Ir-(eta(2)-allyl) bond. In contrast, protonation of complex 4 with HCl stops at the hydrido complex [Ir{(allyl)B(CH(2)PPh(2))(pz)(2)}(CO)H(PPh(3))]Cl (8). X-ray diffraction studies carried out on complexes 2, 3, and 9 show the versatility of the hybrid scorpionate ligand in its coordination.
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Affiliation(s)
- José A Camerano
- Departamento de Química Inorgánica, Instituto de Ciencias de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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22
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Clot E, Eisenstein O, Jones WD. Structural and dynamic properties of propane coordinated to TpRh(CNR) from a confrontation between theory and experiment. Proc Natl Acad Sci U S A 2007; 104:6939-44. [PMID: 17412834 PMCID: PMC1855355 DOI: 10.1073/pnas.0609454104] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Density functional calculations with the B3PW91 functional have been carried out on the TpRh(CNMe) species [Tp = HB(pyrazolyl)(3)] as a model for Tp'Rh(CNCH(2)CMe(3)) [Tp' = HB(3,5-dimethylpyrazolyl)(3)] in interaction with propane. Two sigma complexes have been found as minima coordinated through either a methyl or a methylene C H bond, the former being more stable. The approach of the alkane to TpRh(CNMe) has been studied. Although no transition state could be located, study of this path reveals the key importance of the partial decoordination of one pyrazole ring. The full coordination of the alkane can only be achieved when the metal is essentially in a square pyramid coordination with one of the three pyrazole groups only weakly interacting with Rh. The main reaction of the methyl sigma complex is oxidative addition, leading to the n-propyl hydride complex. In contrast, two reactions are found for the methylene sigma complex: (i) oxidative addition to give the isopropyl complex and (ii) exchange between the secondary and primary C H bonds to convert the methylene complex of propane into a methyl complex of propane. This latter reaction has a much lower barrier than the oxidative addition at the methylene C H bond. The results account well for most of the experimental results obtained from kinetic studies. Steric factors are found to control the energy barriers between these various processes, disfavoring any process that brings the central carbon into close proximity to Rh.
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Affiliation(s)
- Eric Clot
- *Institut Charles Gerhardt (Unité Mixte de Recherche 5253, Centre National de la Recherche Scientifique, Université Montpellier 2, École Nationale Supérieure de Chimie de Montpellier, Université Montpellier 1), Chimie Théorique Méthologies Modélisations, cc 14, Université Montpellier 2, 34095 Montpellier Cedex 5, France; and
| | - Odile Eisenstein
- *Institut Charles Gerhardt (Unité Mixte de Recherche 5253, Centre National de la Recherche Scientifique, Université Montpellier 2, École Nationale Supérieure de Chimie de Montpellier, Université Montpellier 1), Chimie Théorique Méthologies Modélisations, cc 14, Université Montpellier 2, 34095 Montpellier Cedex 5, France; and
- To whom correspondence should be addressed. E-mail:
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, NY 14627
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López JA, Mereiter K, Paneque M, Poveda ML, Serrano O, Trofimenko S, Carmona E. Unusual fragmentation of CH2Cl2by an Ir(iii) centre bonded to a doubly metalated TpMsLigand (TpMs= hydrotris(3-mesitylpyrazol-1-yl)borate). Chem Commun (Camb) 2006:3921-3. [PMID: 17268671 DOI: 10.1039/b608293a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Ir(III) compound Tp(Ms'')Ir(N2), that contains a pentadentate, doubly metalated 3-mesityl substituted tris(pyrazolyl)borate ligand, induces the cleavage of C-H and C-Cl bonds of CH2Cl2 to yield a highly electrophilic chlorocarbene Ir=C(H)Cl complex.
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Affiliation(s)
- Jorge A López
- Universidad de Guanajuato, Instituto de, Investigaciones Científicas, Cerro de la Venada s/n, Col. Pueblito de Rocha, Guanajuato, México
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24
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Ezhova MB, Patrick BO, Sereviratne KN, James BR, Waller FJ, Ford ME. Interactions of Rh(III)−Dihydrido−Bis(phosphine) Complexes with Semicarbazones. Inorg Chem 2005; 44:1482-91. [PMID: 15732990 DOI: 10.1021/ic0489185] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interaction of cis,trans,cis-[Rh(H)2(PR3)2(acetone)2]PF6 complexes (R = aryl or R3 = Ph2Me, Ph2Et) under H2 with E-semicarbazones gives the Rh(III)-dihydrido-bis(phosphine)-semicarbazone species cis,trans-[Rh(H)2(PR3)2{R'(R' ')C=N-N(H)CONH2}]PF6, where R' and R' ' are Ph, Et, or Me. The complexes are generally characterized by elemental analysis, 31P{1H} NMR, 1H NMR, and IR spectroscopies, and MS. X-ray analysis of three PPh3 complexes reveals chelation of E-semicarbazones by the imine-N atom and the carbonyl-O atom. In contrast, the corresponding reaction of [Rh(H)2(PPhMe2)2(acetone)2]PF6 with acetophenone semicarbazone gives the ortho-metalated-semicarbazone species cis-[RhH(PPhMe2)2{o-C6H4(Me)C=N-N(H)CONH2}]PF6. The X-ray structure of E-propiophenone semicarbazone is also reported. Rhodium-catalyzed, homogeneous hydrogenation of semicarbazones was not observed even at 40 atm H2.
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Affiliation(s)
- Maria B Ezhova
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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25
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Aullón G, Esquius G, Lledós A, Maseras F, Pons J, Ros J. Unexpected Influence of the Counteranion in the κ2 vs κ3 Hapticity of Polydentate N-Donor Ligands in [RhI(N-ligand)L2]+ Complexes. Organometallics 2004. [DOI: 10.1021/om049766o] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabriel Aullón
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Glòria Esquius
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Feliu Maseras
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Josefina Pons
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
| | - Josep Ros
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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26
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Clot E, Eisenstein O, Weng TC, Penner-Hahn J, Caulton KG. Is the Allylpalladium Structure Altered between Solid and Solutions? J Am Chem Soc 2004; 126:9079-84. [PMID: 15264841 DOI: 10.1021/ja049091g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recent EXAFS measurements on [(Ph(2)PCH(2)CH(2)PPh(2))Pd(H(2)CCHCMe(2))]O(3)SCF(3) (Tromp et al. J. Am. Chem. Soc. 2002, 124, 14814) were interpreted as evidence that, when the complex is dissolved in THF, the allyl ligand adopts an eta(2) structure with a dangling allyl CH(2) substituent. DFT calculations of the Pd complex using H(2)P-CH(2)CH(2)-PH(2) as a model for Ph(2)P-CH(2)CH(2)-PPh(2) (dppe), in the absence or the presence of the triflate counteranion, and modeling the THF solvent by explicit Me(2)O molecules or by a continuum model give always a conventional eta(3)-H(2)CCHCMe(2) structure with equal Pd-C bonds to the terminal carbon centers of the allyl. QM/MM calculations using the dppe ligand also fail to support an eta(2)-allyl structure as a global minimum. The EXAFS parameter space is shown to have multiple minima. These have very similar overall EXAFS, but have very different structural parameters. The minimum that was the basis for the previous structural conclusion gives a slightly better fit but has unrealistic Debye-Waller factors and threshold energies.
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Affiliation(s)
- Eric Clot
- LSDSMS (UMR 5636), case courrier 14, Université Montpellier 2, 34095 Montpellier Cedex 5, France
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27
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Teuma E, Malbosc F, Etienne M, Daran JC, Kalck P. A one-pot method to prepare the carbene complex [TpMe2,ClRhCl2(CHNiPr2)] from [TpMe2,ClRh(CO)2], CHCl3, and NHiPr2. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.02.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Teuma E, Loy M, Le Berre C, Etienne M, Daran JC, Kalck P. Tandem Carbonylation Reactions: Hydroformylation and Hydroaminomethylation of Alkenes Catalyzed by Cationic [(H2C(3,5-Me2pz)2)Rh(CO)L]+ Complexes. Organometallics 2003. [DOI: 10.1021/om030351x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emmanuelle Teuma
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Maxime Loy
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Carole Le Berre
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Michel Etienne
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Jean-Claude Daran
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Philippe Kalck
- Laboratoire de Catalyse, Chimie Fine et Polymères, Ecole Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, 118 route de Narbonne, 31077 Toulouse Cedex 4, France, and Laboratoire de Chimie de Coordination du CNRS, UPR 8241, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
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Carmona E, Cingolani A, Marchetti F, Pettinari C, Pettinari R, Skelton BW, White AH. Synthesis and Structural Characterization of Mixed-Sandwich Complexes of Rhodium(III) and Iridium(III) with Cyclopentadienyl and Hydrotris(pyrazolyl)borate Ligands. Organometallics 2003. [DOI: 10.1021/om020930m] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ernesto Carmona
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Augusto Cingolani
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Fabio Marchetti
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Claudio Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Riccardo Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Brian W. Skelton
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Allan H. White
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Via S. Agostino 1, I-62032 Camerino, MC, Italy, Instituto de Investigaciones Químicas, Universidad de Sevilla-CSIC, Avenida Américo Vespucío s/n, Isla de la Cartuja, 41092 Sevilla, Spain, and Department of Chemistry, The University of Western Australia, Crawley, Western Australia 6009, Australia
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Grotjahn DB, Van S, Combs D, Lev DA, Schneider C, Incarvito CD, Lam KC, Rossi G, Rheingold AL, Rideout M, Meyer C, Hernandez G, Mejorado L. Substituent control of hydrogen bonding in palladium(II)-pyrazole complexes. Inorg Chem 2003; 42:3347-55. [PMID: 12739977 DOI: 10.1021/ic026104n] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inter- and intramolecular hydrogen bonding of an N-H group in pyrazole complexes was studied using ligands with two different groups at pyrazole C-3 and C-5. At C-5, groups such as methyl, i-propyl, phenyl, or tert-butyl were present. At C-3, side chains L-CH(2)- and L-CH(2)CH(2)- (L = thioether or phosphine) ensured formation of chelates to a cis-dichloropalladium(II) fragment through side-chain atom L and the pyrazole nitrogen closest to the side chain. The significance of the ligands is that by placing a ligating side chain on a ring carbon (C-3), rather than on a ring nitrogen, the ring nitrogen not bound to the metal and its attached proton are available for hydrogen bonding. As desired, seven chelate complexes examined by X-ray diffraction all showed intramolecular hydrogen bonding between the pyrazole N-H and a chloride ligand in the cis position. In addition, however, intermolecular hydrogen bonding could be controlled by the substituent at C-5: complexes with either a methyl at C-5 or no substituent there showed significant intermolecular hydrogen bonding interactions, which were completely avoided by placing a tert-butyl group at C-5. The acidity of two complexes in acetonitrile solutions was estimated to be closer to that of pyridinium ion than those of imidazolium or triethylammonium ions.
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Affiliation(s)
- Douglas B Grotjahn
- Department of Chemistry, 5500 Campanile Drive, San Diego State University, San Diego, CA 92182-1030, USA.
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31
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Santos LL, Mereiter K, Paneque M, Slugovc C, Carmona E. C–H bond activation reactions by TpMe2Ir(iii) centres. Generation of Fischer-type carbenes and development of a catalytic system for H/D exchange. NEW J CHEM 2003. [DOI: 10.1039/b209324c] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Iron MA, Lo HC, Martin JML, Keinan E. TpPtMe(H)(2): why is there H/D scrambling of the methyl group but not methane loss? J Am Chem Soc 2002; 124:7041-54. [PMID: 12059228 DOI: 10.1021/ja025667v] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactivity of TpPtMe(H)(2) (Tp = hydrido-tris(pyrazolyl)borate) was investigated. This complex is remarkably resistant to methane loss; heating it in methanol at 55 degrees C does not lead to either methane or hydrogen loss. When CD(3)OD is used, reversible H/D scrambling of the hydrides and the methyl hydrogens occurs. This reactivity was investigated by density functional theory (DFT) methods at the mPW1k/LANL2DZ+P//mPW1k/LANL2DZ level. It was found that methane loss cannot occur due to the rigidity of the Tp ligand, which does not allow the trans geometry which would be required for the product of methane elimination, TpPtH. The resulting complex is very high in energy, and therefore the loss of methane is unfavorable. On the other hand, H/D scrambling of the methyl ligand is relatively facile. It proceeds through an eta(2-CH)-CH(4) complex, even though methane loss is not observed. The model system, [(NH(3))(3)PtMe(H)(2)](+) was examined to verify that the cause of the observations is the rigidity of the Tp system. The reaction was investigated at a number of levels of DFT. It was concluded that investigations of similar sized systems should be examined at the above level of theory or the mPW1k/SDB-cc-pVDZ//mPW1k/SDD level for improved accuracy of the energetic calculations.
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Affiliation(s)
- Mark A Iron
- Department of Organic Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
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