烯酮
化学
脱碳
闪蒸真空热解
电子电离
光化学
电离
异构化
离子
亲核细胞
分子内力
药物化学
热解
立体化学
有机化学
催化作用
作者
Robert Flammang,Fouad Bachir Ben Abdelouahab,Kadiebwe Munkengeshayi,Pierre Boulanger
出处
期刊:Bulletin des Sociétés Chimiques Belges
[Wiley]
日期:2010-09-01
卷期号:101 (3): 215-225
被引量:1
标识
DOI:10.1002/bscb.19921010309
摘要
Electron impact ionization of 1-acryloylpyrazole [1] induces a unimolecular loss of CO forming ionized 1-vinylpyrazole [2] as shown by metastable ion characteristics and neutralization-reionization data. This CO loss implies a rate-determining isomerization process into a pyrazolylmethyl ketene structure 1a+. These ketene ions have been synthetized in the ion source by dissociative ionization of pyrazolylpropionylpyrazoles. Flash-vacuum pyrolysis of these compounds also affords the expected neutral ketenes in the gas phase, which are however readily converted into the acryloyl isomers by an intramolecular nucleophilic process.
科研通智能强力驱动
Strongly Powered by AbleSci AI