Dimerization of a marginally stable disilenyl germylene to tricyclic systems: evidence for reversible NHC-coordination

Chemical Communications : Chem Comm
David NiederDavid Scheschkewitz

Abstract

Tetrasiladigermatricyclohexanes in two isomeric forms (chair and doubly-bridged tetrahedron) are obtained by the reaction of MeLi with an α-chlorosilyl functionalized NHC-stabilized silagermenylidene. (29)Si NMR at low temperature proves the initial formation of a monomeric NHC-adduct of a disilenyl germylene followed by cyclisation to the isomeric heavy cyclopropene. Addition of an excess of NHC stabilizes the both intermediates and demonstrates the reversibility of rate-determining initial equilibria involving NHC dissociation. Finally, a mixture of two isomeric tricyclic Si4Ge2 species is obtained: at elevated temperature the chair isomer converts to the doubly edge-bridged tetrahedron.

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Citations

Sep 27, 2016·Journal of the American Chemical Society·David NiederDavid Scheschkewitz
Apr 22, 2017·Angewandte Chemie·Naoki HayakawaTsukasa Matsuo
Mar 2, 2017·Angewandte Chemie·Ricardo RodriguezTsuyoshi Kato
Mar 9, 2017·Chemistry : a European Journal·Sudip PanGabriel Merino
Feb 22, 2018·Chemistry : a European Journal·Bastian WeinertStefanie Dehnen
Aug 7, 2019·Chemical Communications : Chem Comm·Lukas KlemmerDavid Scheschkewitz
Dec 15, 2018·Angewandte Chemie·Yannic HeiderDavid Scheschkewitz
May 7, 2019·Chemical Science·Yannic HeiderDavid Scheschkewitz
Jun 27, 2017·Chemistry : a European Journal·Felix NeumeyerNorbert Auner
Jun 10, 2021·Journal of the American Chemical Society·Paresh Kumar MajhiDavid Scheschkewitz
Jul 22, 2021·Angewandte Chemie·Milan Kumar BisaiSakya S Sen
Jul 4, 2018·Chemical Reviews·Vitaly NesterovShigeyoshi Inoue
Aug 31, 2021·Chemistry : a European Journal·Zeyu Han, Derek P Gates

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