Chaleogen transfer to bis[2-(dimethylaminomethyl)phenyl]silanediyl by isocyanates and isothiocyanates

Article abstract of DOI:10.1002/cber.19961290203

Reaction of hexakis[2-(dimethylaminomethyl)pnenyl]cyclotrisilane (1) with isocyanates results in the clean formation of cyclic di- or trisiloxanes 3 and 4a and the corresponding isonitrile. Single-crystal X-ray analysis of tetrakis[2-(dimethylaminomethyl)phenyi]cyclodisiloxane (4a) reveals each sili-con center to interact with two amino groups forming Si...N distances, which differ significantly in length. Phenyl isothiocyanate reacts with 1 with transfer of sulfur to yield pentacoordinated bis[2-(dimethylaminomethyl)phenyl]silanethione (11). VCH Verlagsgesellschaft mbH 1996.