ArticleAngewandte Chemie (International ed. in English)2026
An NHC-Coordinated Silicon/Sulfur Analogue of an Acyl Carbene.
Article in Angewandte Chemie (International ed. in English), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Despite great advances in the chemistry of low-valent silicon species, a silicon/sulfur analogue of an acyl carbene, namely a silathioacyl silylene, has remained elusive. Herein, we report that the reaction of dialkyldisilyne 1 with cyclic thiourea 2a affords 3, an N-heterocyclic carbene (NHC) complex of a silathioacyl silylene. The solid-state structure of 3 reveals a three-membered ring with a markedly elongated Si─S bond and an Si-Si single bond, consistent with hitherto unknown intramolecular coordination of the silanethione sulfur to the silylene center, while computational studies indicate negligible disilathiirene character. Compound 3 exhibits silylene-like reactivity toward xylyl isocyanide to give an NHC complex of an imino-substituted silanethione.
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