| Autor: |
Pierre Boulanger, Fouad Bachir Ben Abdelouahab, Robert Flammang, Kadiebwe Munkengeshayi |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Bulletin des Sociétés Chimiques Belges. 101:215-225 |
| ISSN: |
0037-9646 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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