Reaction of cyclotrisilene with phenylacetylene: an unusual product with a bicyclo[3.2.0]hepta-3,6-diene skeletonElectronic supplementary information (ESI) available: experimental procedure, spectral data and X-ray data (CCDC 182/1876) of the products. See http://www.rsc.org/suppdata/cc/b0/b008375p/

Abstract

Cyclotrisilene, (^tBu₂MeSi)₄Si₃, was reacted with phenylacetylene to produce an unusual 1,2,5-trisilabicyclo[3.2.0]hepta-3,6-diene derivative, whose structure was determined by NMR spectroscopy and X-ray crystallography; a mechanism for its formation is proposed.