Ion–molecule reactions in dimethylsulfoxide by high pressure photoionization mass spectrometry
- 15 February 1980
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 58 (4) , 376-380
- https://doi.org/10.1139/v80-060
Abstract
Dimethylsulfoxide (DMSO) has been photoionized at 10.0 and 11.7 eV over the pressure range 0.3–210 mTorr. The rate constant for the disappearance of DMSO+ is 1.0 × 10−9 cm3 molecule−1 s−1, independent of photon energy. The major products at low pressure are CH3SO(CH3SO)CH3+ and CH3SOHCH3+ while at high pressure the ion series (DMSO)nH+ predominates with n ≤ 5. In experiments with mixtures of DMSO and water or methanol very little mixed solvation of the proton was observed although isotopic D/H exchange between D2O and (DMSO)2H+ is facile.Keywords
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