Spectrométrie de Masse de Pyrazoline‐5‐Ones N1 Substituées. II. 2‐Pyrazoline‐5‐Ones A Structure Fixe et Pyrazoline‐5‐ones Tautomérisables.
- 1 January 1973
- journal article
- research article
- Published by Wiley in Bulletin des Sociétés Chimiques Belges
- Vol. 82 (11-12) , 757-765
- https://doi.org/10.1002/bscb.19730821107
Abstract
The behaviour under electron impact of fixed 2‐pyrazolin‐5‐ones has been investigated. The main decomposition pathway of these compounds is characteristic of their isomeric structure. The fragmentation pattern of tautomeric N1. substituted pyrazolin‐5‐ones must be interpreted in term of CH form; this suggest that this form prevailes in the gas phase. This result has been verified by I. R. for 1,3‐ and 1,4‐dimethylpyrazolin‐5‐one.Keywords
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