Infrared laser-induced chemistry of chlorodifluoromethane–silane mixtures at two irradiating wavelengths

Abstract

Chemical reactions induced by single- and two-wavelength CO₂ laser radiation in a mixture of silane and chlorodifluoromethane are initiated by the reaction between :CF₂ and SiH₄ and afford volatile carbonaceous products with C—H bonds, together with a solid deposit consisting of silicon carbide and highly reactive Si/C/H/F polymeric material. The results are in line with the reduction of the strong C—F bond of difluorocarbene and with the production of H₂SiCF₂ silene as intermediate which undergoes dehydrofluorination and polymerization.