A new 1,3-dichlorodisflazane, 1,3-dichloro-1,3-dimethyl-1,3-divinyldisilaza
ne (DMDV), was prepared from the trans-silylation reaction of hexamethyldis
ilazane (MMN) and methyl-vinyldichlorosilane. The reactions between MMN and
other dichlorosilanes, R2SiCl2 (R =Me, Ph) in the absence of catalyst were
also investigated, and the expected, 1,3-dichlorosilazanes, (ClSiMe2)(2)NH
and (ClSiPh2)(2)NH were obtained, respectively.