Kinetics and products of the gas-phase reactions of (CH3)4Si, (CH3)3SiCH2OH, (CH3)3SiOSi(CH3)3 and (CD3)3SiOSi(CD3)3 with Cl atoms and OH radicals

Abstract

Direct air-sampling atmospheric-pressure ionisation tandem mass spectrometry and FTIR spectroscopy were used to analyse the products of the OH radical- and Cl atom-initiated reactions of hexamethyldisiloxane, [²H₁₈]hexamethyldisiloxane, tetramethylsilane and trimethylsilylmethanol at room temperature and atmospheric pressure. The data obtained indicate the initial formation of (CH₃)₃SiOSi(CH₃)₂OCHO and (CD₃)₃SiOSi(CD₃)₂OCDO from hexamethyldisiloxane and [²H₁₈]hexamethyldisiloxane, respectively, and (CH₃)₃SiOCHO from both tetramethylsilane and trimethylsilylmethanol.