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Synthesis and Reactivity of a Cationic Platinum(II) Alkylidene Complex

Authors

  • Jesus Campos,

    1. Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ), Universidad de Sevilla—Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla (Spain)
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  • Dr. Riccardo Peloso,

    1. Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ), Universidad de Sevilla—Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla (Spain)
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  • Prof. Ernesto Carmona

    Corresponding author
    1. Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ), Universidad de Sevilla—Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla (Spain)
    • Departamento de Química Inorgánica, Instituto de Investigaciones Químicas (IIQ), Universidad de Sevilla—Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla (Spain)
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  • Financial support (FEDER contribution and Subprograma Juan de la Cierva) from the Spanish Ministry of Science and Innovation (Projects CTQ2010-17476 and Consolider-Ingenio 2010 CSD2007-00006) and the Junta de Andalucía (Projects FQM-119 and P09-FQM-4832) is gratefully acknowledged. J.C. thanks the Spanish Ministry of Education for a research grant (AP-20080256).

Abstract

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Often proposed, hard to catch: The bis(platinacycle) trans-[Pt{P[2,6-(CH2)(Me)C6H3]iPr2}2] experiences α-hydride abstraction by action of Ph3C+PF6 to yield a trans-alkyl–alkylidene species. The electrophilicity of its {Pt[DOUBLE BOND]CH}+ unit is demonstrated by ylide formation by reaction with Lewis bases, stepwise hydrogenation, and carbene cross-coupling with N2C(H)CO2Et (see scheme).

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