77533-94-9Relevant articles and documents
Mass Spectra of Substituted Δ2-1,2,4-Oxadiazolines. II
Albuquerque, Julianna F. C. de,Srivastava, R. M.
, p. 95 - 100 (2007/10/02)
5,5-Pentamethylene-3-(phenyl or para-substituted-phenyl)-Δ2-1,2,4-oxadiazolines, 1a-e, were examined by electron-impact mass spectrometry.Defocussed metastable ion detections confirmed the formation of certain daughter fragments from the mother ions.The exact mass measurements helped to make the correct assignment of various species.We conclude that it is the spiro arrangement which caused such a dramatic change in the decomposition pattern.Several new fragmentation pathways have been found in the present studies.Out of five oxadiazolines prepared for the present work, three (1b,d,e) are new.