Gas-phase formation of SiSe in IR laser-co-decomposition of dimethyl selenide and 1,3-disilacyclobutane

A LIF excitation spectrum of SiSe obtained upon IR laser irradiation of gaseous mixture of 1,3-disilacyclobutane and dimethyl selenide reveals that the previously reported infrared multiple photon co-decomposition of both compounds involves formation of SiSe. The SiSe formation is explained in terms of reaction of Se atoms with RHSi: silylenes (R = CH3, H) and silene, and elimination of RH from silaneselones (RHSiSe, R = CH3, H).