Determination of energy transfereffects for molecular decomposition

摘要

We have analyzed the data for the mulltichannel decomposition of disilane using the master equation approach.From the data on the main process,Si_2H_6=SiH_2+SiH_4,we deduced step size down values for argons as the collision partner ranging from 600 cm~(-1) near room temperature and 500 cm~(-1) near 1000 K on the basis of an exponential model for the transition probabilities.Values for He are in the 250-400 cm~(-1) range.SF_6 and disilane are strong colliders.The numbers at or near room temperature are much larger than those for hydrocarbons.Problems in assessing the importance of the silylsilylene insertion reaction are discussed.Issues dealing with the treatment of multichannel unimolecular decompositions are considered.