[[(Me<sub>3</sub>Si)<sub>2</sub>CH]<sub>2</sub><sup><i>i</i></sup>PrSi(NHC)SiSi(Me)Si<sup><i>i</i></sup>Pr[CH(SiMe<sub>3</sub>)<sub>2</sub>]<sub>2</sub>]<sup>+</sup>: A Molecule with Disilenyl Cation Character

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    Abstract

    Reaction of the disilyne–NHC complex <b>1</b> [RLSiSiR: (R = Si<sup><i>i</i></sup>Pr­[CH­(SiMe<sub>3</sub>)<sub>2</sub>]<sub>2</sub>, L = NHC)] with MeOTf gave the cation <b>2</b> [RLSiSiRMe]<sup>+</sup>, which is the first example of a base-stabilized heavy group 14 element analogue with vinyl cation character. Cation <b>2</b> has been fully characterized by multinuclear NMR spectroscopy and X-ray diffraction analysis. The molecular structure indicates that there are significant contributions from the NHC-stabilized cationic resonance structure <b>2A</b>, the disilene-like structure <b>2B</b>, and even some contribution from the silylene-like structure <b>2C</b>

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      Last time updated on 16/03/2018