PROTONATED METHANESULFONIC-ACID AND RELATED IONS - A STUDY OF THEIR GAS-PHASE STRUCTURE AND REACTIVITY

被引：2
|
作者：
DEPETRIS, G [1 ]
FORNARINI, S [1 ]
OCCHIUCCI, G [1 ]
机构：
[1] CNR,IST CHIM NUCL,I-00016 MONTEROTONDO,ITALY
来源：
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1992年 / 112卷 / 2-3期
关键词：
METHANESULFONIC ACID; BRACKETING PROCEDURE;
D O I：
10.1016/0168-1176(92)80007-N
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
[CH3SO2]+, [CH3SO3H2]+ and [CH3SO2OCH3H]+, positive even-electron ions from hexavalent sulfur compounds, have been studied by Fourier transform ion cyclotron resonance and collision-induced dissociation (CID). These ions showed no evidence of undergoing S + O methyl group shift, at variance with easy skeletal rearrangements frequently postulated for ionized sulfones and sulfonyl derivatives. A proton affinity value of 184 +/- 2 kcal mol 1 has been obtained for methanesulfonic acid by the bracketing procedure, but the site of proton attachment in [CH3SO3H2]1 ions could not be established, either by CID or kinetic evidence. The methylation of SO2 by (CH3)2F+ ions has been ascertained to yield [CH3SO2]+ ions methylated on oxygen, in analogy to the same reaction observed in a superacid medium.
引用
收藏
页码：231 / 246
页数：16
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