A stable cyclic (silyl)(thia)silylene via stepwise cycloaddition
John C Johnson1, Yuzhong Wang1, Pingrong Wei1
1Department of Chemistry and the Center for Computational Chemistry, The University of Georgia, Athens, Georgia 30602-2556, USA. robinson@uga.edu.
Abstract:
Low temperature reaction of imidazole-based dithione dimer (1) with carbene-stabilized disilicon(0) (2) (in a 1 : 1 molar ratio) gives a carbene-stabilized cyclic (silyl)(thia)silylene (3), wherein a dithiolene unit (C2S2) is integrated into a C2S2Si2 six-membered ring. Computations suggest that 3 is formed via an unprecedented stepwise [4 + 2]-like cycloaddition reaction between a SiIISi0 double bond and a dithione.
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