Volume 129, Issue 10 pp. 2816-2819
Zuschrift

A Cationic Unsaturated Platinum(II) Complex that Promotes the Tautomerization of Acetylene to Vinylidene

Dr. Laura Ortega-Moreno

Dr. Laura Ortega-Moreno

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 Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain

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Dr. Riccardo Peloso

Dr. 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 Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain

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Dr. Joaquín López-Serrano

Dr. 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 Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain

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Dr. Javier Iglesias-Sigüenza

Dr. Javier Iglesias-Sigüenza

Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Prof. García González 1, 41012 Sevilla, Spain

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Dr. Celia Maya

Dr. Celia Maya

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 Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain

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Prof. Ernesto Carmona

Corresponding Author

Prof. 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 Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain

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First published: 01 February 2017
Citations: 3

Abstract

Complex [PtMe2(PMe2Arurn:x-wiley:00448249:media:ange201700087:ange201700087-math-0001 )] (1), which contains a tethered terphenyl phosphine (Arurn:x-wiley:00448249:media:ange201700087:ange201700087-math-0002 =2,6-(2,6-iPr2C6H3)2C6H3), reacts with [H(Et2O)2]BArF (BArF=B[3,5-(CF3)2C6H3]4) to give the solvent (S) complex [PtMe(S)(PMe2Arurn:x-wiley:00448249:media:ange201700087:ange201700087-math-0003 )]+ (2⋅S). Although the solvent molecule is easily displaced by a Lewis base (e.g., CO or C2H4) to afford the corresponding adducts, treatment of 2⋅S with C2H2 yielded instead the allyl complex [Pt(η3-C3H5)(PMe2Arurn:x-wiley:00448249:media:ange201700087:ange201700087-math-0004 )]+ (6) via the alkyne intermediate [PtMe(η2-C2H2)(PMe2Arurn:x-wiley:00448249:media:ange201700087:ange201700087-math-0005 )]+ (5). Deuteration experiments with C2D2, and kinetic and theoretical investigations demonstrated that the conversion of 5 into 6 involves a PtII-promoted HC≡CH to :C=CH2 tautomerization in preference over acetylene migratory insertion into the Pt−Me bond.

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