An earlier investigation in these laboratories of the thermally induced decomposition of EtSiH3 (ES)'by the comparativerate single-pulse shock-tube method (CR-SPST, T= 1165 & 80 K, Ptotal-3200 Torr, PES-6 Torr) showed that the ES decomposition is initiated by al, l-H2 elimination process yielding ethylsilylene (EtSiH) and that the ethylsilylene so produced decomposes to C2b and SiH2 with an activation energy of less than 30 kcal. Rate ...