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Issue 23, 2020
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A highly unsaturated six-vertex amido-substituted silicon cluster

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Abstract

Thermal treatment of the bicyclo[1.1.0]tetrasilatetraamide [Si4{N(SiMe3)Dipp}4] 1 resulted in the formation of a highly unsaturated six-vertex silicon cluster [Si6{N(SiMe3)Dipp}4] 2 with only four amine-substituents and two ligand-free silicon atoms. In solution, a major and a minor conformer of this cluster are in equilibrium according to multinuclear NMR spectroscopy, lineshape analysis, DFT calculations and molecular dynamics simulations. The bonding situation in the highly unsaturated cluster features lone pair type character at the ligand-free silicon atoms and partial single and double bond character in the upper butterfly-shaped ring of 2. This allows to consider 2 as the silicon analogue of a butalene isomer.

Graphical abstract: A highly unsaturated six-vertex amido-substituted silicon cluster

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Supplementary files

Article information


Submitted
09 Mar 2020
Accepted
10 May 2020
First published
11 May 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 5895-5901
Article type
Edge Article

A highly unsaturated six-vertex amido-substituted silicon cluster

J. Keuter, C. Schwermann, A. Hepp, K. Bergander, J. Droste, M. R. Hansen, N. L. Doltsinis, C. Mück-Lichtenfeld and F. Lips, Chem. Sci., 2020, 11, 5895
DOI: 10.1039/D0SC01427C

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