Zur Darstellung und Destillation des Oktamethylcyclotetrasilazans

摘要

Ammonolysis of 1.3-dichlorotetramethyldisilazane leads to octamethylcyclotetrasilazane but surprisingly also to hexamethylcyclotrisilazane. The ratio of formation of both ringsystems is comparable with the ammonolysis of dimethyldichlorosilane and subject to broad fluctuations which are not controllable by specific concentrations of dimethyldichlorosilane or of 1.3-dichlorotetramethyldisilazane or by changing into alkaline milieu. Octamethylcyclotetrasilazane boils at 115°C/11 mm and 239°C/760 mm resp.; in vacuo it is highly volatile below its melting point of 97