Investigation of unimolecular decomposition and isomerisation reactions of some metastable carboxonium ions in the gas phase

摘要: The C3H5O+ cations generated from CH2CH·CH(OH)CH3, CH2CH·O·CH2·CH3, [graphic omitted] and CH3·[graphic have been shown to isomerise the same structure or mixture of structures before fragmentation with a rate constant in region 105–106 sec.–1. However, ion CH3·CH2·CO2Me remains structurally distinct. Protonated carboxylic acid ions n-butyl esters acrylic, crotonic, propionic acids remain distinct isomeric dehydration corresponding acylium metastable transition.