Issue 21, 2018

Stable unsaturated silicon clusters (siliconoids)

Abstract

Unsaturated silicon clusters are key intermediates of silicon deposition processes from the gas phase, which is reflected in the recently introduced term “siliconoids” for silicon rich clusters with at least one hemispheroidally coordinated vertex. Unlike the case of metalloid clusters of heavier Group 14 elements, stable homonuclear derivatives containing silicon have become available just recently. This review summarizes the developments since the first report on a stable unsaturated silicon cluster in 2005. The synthesis, structure and reactivity under retention of the unsaturated vertices (i.e. the functionalization) of stable siliconoids is discussed within the broader context of soluble Zintl anions of silicon and metalloid clusters. A structural parameter is introduced as a quantitative measure to characterize the “hemispheroidality” of an unsubstituted vertex of a siliconoid.

Graphical abstract: Stable unsaturated silicon clusters (siliconoids)

Article information

Article type
Frontier
Submitted
15 Mar 2018
Accepted
11 Apr 2018
First published
12 Apr 2018

Dalton Trans., 2018,47, 7104-7112

Stable unsaturated silicon clusters (siliconoids)

Y. Heider and D. Scheschkewitz, Dalton Trans., 2018, 47, 7104 DOI: 10.1039/C8DT01009A

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