Kinetics of the formation of dimethylsilanediyl (dimethylsilylene) in the pyrolysis of pentamethyldisilane and heptamethyltrisilane

Abstract

Experimental kinetic data are reported for the pyrolysis of heptamethyltrisilane to form dimethylsilanediyl, trapped by excess 2,3-dimethylbuta-1,3-diene; it is shown by computer modelling that formation of the trapped product is rate-determined by the primary reaction in that pyrolysis and in the pyrolysis of pentamethyldisilane, a conclusion which has thermochemical implications.