IR laser-induced thermolysis of silacyclopent-3-ene: extrusion of silylene and chemical vapour deposition of polycarbosilane phases via reactions of silylene, buta-1,3-diene and methylene

Infrared laser-induced (SF6) photosensitized decomposition and infrared laser multiphoton decomposition of silacyclopent-3-ene occur as extrusion of silylene, yielding butadiene as a major gaseous product and affording chemical vapour deposition of solid saturated polycarbosilane films. The involvement of H2Si:, H2C: and buta-1,3-diene in the formation of the films is revealed through quantification of the gaseous products and identification of H2Si: and H2C: by laser induced fluorescence.