Abstract

A series of new monocyclic diorganosilanes were prepared by condensation reactions of the appropriate diorganodichlorosilane with sulfur containing diols.1-3 The eight-membered rings containing bridging sulfinyl groups2 are positioned in anti chair-like conformations which precluded any additional coordination at silicon. This contrasts with silanes having sulfur1 or sulfonyl3 groups in place of sulfinyl in the ring system where Si–S or Si–O coordination was evident. In these molecules, X-ray studies showed1,3 that the rings has syn boat-like conformations.

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