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

Infrared laser-induced (SF6) photosensitized decomposition and infrared las er multiphoton decomposition of silacyclopent-3-ene occur as extrusion of s ilylene, yielding butadiene as a major gaseous product and affording chemic al vapour deposition of solid saturated polycarbosilane films. The involvem ent of H2Si:, H2C: and buta-1,3-diene in the formation of the films is reve aled through quantification of the gaseous products and identification of H 2Si: and H2C: by laser induced fluorescence. (C) 2000 Elsevier Science S.A. All rights reserved.