Synthese und Struktur des ersten oligomeren cyclischen Dimethylsilyl‐substituierten Carbodiimids

Synthesis and Structure of the First Oligomeric Cyclic Dimethylsilyl‐Substituted Carbodiimide New oligomeric cyclic silylcarbodiimides 1–3 are synthesised by the reaction of the respective dichlorosilanes with cyanamide. From the resulting reaction mixture with dichloro‐dimethylsilane the tetrameric compound of the hypothetical [(CH 3 ) 2 Si=N–CN] is isolated. In this molecule sixteen atoms build a nearly planar ring structure with a special steric arrangement of the groups. This oligomeric silylcarbodiimides present a new kind of precursors for the pyrolytic synthesis of ceramics in the ternary system SiCN.