Azomethine derivatives. Part XVI. Some diphenylmethyleneaminosilanes and di-t-butylmethyleneaminosilanes
Abstract
Reactions between the chlorosilanes, MenSiCl4 –n(n= 0–3), and di-t-butylmethyleneaminolithium, But2C:NLi, afford the mono(alkylideneamino)silanes, But2C:NSiMenCl3 –n, even when an excess of But2C:NLi is used. These alkylideneaminosilanes have i.r. and 1H n.m.r. spectra consistent with linearity of their C:NSi skeletons, as appropriate for maximum N[graphic omitted]Si (p→d)π-bonding. Analogous reactions between equimolar proportions of MenSiCl4 –n(n= 0–2) and Ph2C:NLi afford the di(alkylideneamino)silanes (Ph2C:N)2SiMenCl2 –n, apparently through disproportionation of the mono-substituted compounds Ph2C:NSiMenCl3 –n which could be isolated only when n= 2. The spectra of the diphenylmethyleneaminosilanes show that these may have bent C:NSi skeletons.