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Mechanism and kinetics of the silane decomposition in the presence of acetylene and in the presence of olefins
Author(s) -
Erwin J. W.,
Ring M. A.,
O'Neal H. E.
Publication year - 1985
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550171004
Subject(s) - chemistry , silane , acetylene , pyrolysis , silylene , photochemistry , kinetics , olefin fiber , decomposition , silylation , ethylene , propene , radical , thermal decomposition , reaction mechanism , polymer chemistry , organic chemistry , catalysis , silicon , physics , quantum mechanics
Kinetic data and product studies are reported for the silane pyrolysis in the presence of olefins and acetylene. The kinetics of silane loss in the presence of acetylene was found to be identical to the initial gas phase silane decomposition step (SiH 4 + M → SiH 2 + H 2 + M) when corrected for pressure fall‐off effects. This result and the absence of methane or ethane from the pyrolysis of SiH 4 in the presence of 1‐butene or 1‐pentene demonstrate that silyl radicals and H atoms are not involved in silane‐olefin or silane‐acetylene reactions. Qualitative aspects and kinetic data from the SiH 4 pyrolysis in the presence of propylene are in accord with propylsilane formation via propylsilylene formed by silylene addition to propylene.