Reactions of CH3OCH2+ with hydrocarbons and O, N, and S compounds: Applications for chemical ionization in selected ion flow tube studies

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Abstract

We report the results of a flowing afterglow ion source-selected ion flow tube study (FA-SIFT) of the reactions of the methoxymethyl cation, CH3OCH2+. Rate coefficients and product branching ratios are reported for twenty nine reagent molecules including those that constitute the major ingredients of air, the hydrocarbons CH4, C2H6, C3H8, n-C4H10, C2H2, C2H4, C3H4 (allene and propyne), C6H6, and the S-containing molecules H2S, CH3SH, C2H5SH, (CH3)2SH, and (C2H5)2SH. In addition, we examined the reactions with the N-containing molecules NH3, CH3NH2, (CH3)2NH, (CH3)3N, pyrrole, pyridine as well as CH3COCH3. The results can be summarized under three general reaction types: Reaction at the CH3 carbon, reaction at the CH2 carbon, and association. The results also indicate that the methoxymethyl cation can be used as a chemical ionization source for the detection of trace levels of S-containing compounds in saturated hydrocarbons. © 2002 American Society for Mass Spectrometry.

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Wilson, P. F., Milligan, D. B., Lam, L. W., Freeman, C. G., Meot-Ner, M., & McEwan, M. J. (2002). Reactions of CH3OCH2+ with hydrocarbons and O, N, and S compounds: Applications for chemical ionization in selected ion flow tube studies. Journal of the American Society for Mass Spectrometry, 13(9), 1028–1033. https://doi.org/10.1016/S1044-0305(02)00427-0

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