New Reactions of a Silylene: Insertion into MN Bonds of M[N(SiMe3)2]2 (M Ge, Sn, or Pb)

The first insertion of a silylene into a MN bond was observed in the presented transformations of the thermally stable silylene 1, Np = neopentyl, with metal(II) bis(silyl)amides. Bis(silyl)metal(II) compounds 2 and 3 were obtained for M = Sn and Pb, respectively, whereas a colorless azadisilager-mole was formed for M  Ge. Noteworthy is the very long SnSi bond of 2.712(2) Å in 2.