Thermochemistry of organosilicon compounds: I. Triorganyl-, tetraorganyl-, organylorganoxy- and tetraorganoxy-silanes

A technique for the controlled combustion of liquid and solid organosilicon compounds has been developed. Seventy-two tetracoordinate silicon compounds: triorganyl-, tetraorganyl-, organylorganoxy- and tetraorganoxysilanes have been investigated thermochemically. Their combustion and sublimation, or evaporation, enthalpies have been determined. Formation enthalpies of the compounds concerned in the condensed and gaseous states, and their atomization enthalpies in the gas phase have been calculated. The magnitudes of the fragments for an additive scheme of calculation of atomization enthalpies and bond energies in organosilicon compounds of the above type have been determined.