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. 2014 Jul 21;20(30):9381-6.
doi: 10.1002/chem.201402874. Epub 2014 Jun 18.

Dihydrogen activation by a silylium silylene frustrated Lewis pair and the unexpected isomerization reaction of a protonated silylene

Annemarie Schäfer  1 , Matti Reißmann, André Schäfer, Marc Schmidtmann, Thomas Müller
Affiliations

Dihydrogen activation by a silylium silylene frustrated Lewis pair and the unexpected isomerization reaction of a protonated silylene

Annemarie Schäfer et al. Chemistry. .

Abstract

The isolable silylene 1 forms a frustrated Lewis pair with silylium ion 2 that is able to split hydrogen under ambient conditions. The protonated silylene 3 obtained in this reaction isomerizes to yield the hydrogen-bridged disilyl cation 4. Cation 4 is fully characterized by NMR spectroscopy and by XRD analysis. Its formation via the protonated silylene 3 is indicated by independent synthesis of cation 3 by hydride abstraction from the corresponding dihydridosilane 11 and is further supported by the results of density functional calculations.

Keywords: FLP; density functional calculations; hydrogen bridging; isomerization; silicon.

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