Ion-Molecule Reactions in Silane-Methane Mixtures

Abstract
The ion‐molecule reactions leading to the formation of SiCH2+ , SiCH3+ , SiCH4+ , and SiCH5+ in the silane‐methane system are reported along with relative and absolute rate constants for the observed reactions. CH3+ , CH4+ , and CH5+ are observed to undergo H transfer reactions with large rate constants. The primary ions Si+ and CH3+ did not react to form products containing silicon‐carbon bonds. It is therefore concluded that methylisilanes produced in activated silane‐methane systems (discharges, nuclear recoil experiments, etc.) do not result from reactions of Si+ and/or CH3+ at thermal kinetic energies.

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