Unusual Reactivity of a C,N-Chelated Stannylene with Siloxanes and Silanols

The reactivity of stannylene (LCN)2Sn (1), where LCN is the 2-(N,N-dimethylaminomethyl)phenyl substituent, toward (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO), silicon grease, and triphenylsilanol was explored. The reaction of 1 with one equivalent of TEMPO and silicon grease yielded cyclo-[(LCN)2SnOSn(LCN)2OSiMe2O] (6a), whereas the addition of two equivalents of TEMPO afforded cyclo-[(LCN)(LCN—O)SnOSiMe2OSiMe2O] (6b), in which the amine...