Abstract Trans-silylation reactions of (Me 3 Si) 2 NH with PhRSiCl 2 (R= Me, Ph) gave HN (SiMePhCl) 2 (1) or ClMePhSiNHSiPh 2 Cl (2). The treatment of 1, 3-dichlorodisilazane (1 or 2) with an equimolar amount of n-BuLi led to the formation of 1, 3-bis (chloro-silyl)-2, 4- dimethyl-2, 4-diphenylcyclodisilazane (ClSiMePh) 2 (NSiMePh) 2 (3) or (ClSiPh 2) 2 (NSiMePh) 2 (4), which was allowed to hydrolyze to form 1, 3-bis (hydroxysilyl)-2, 4- ...