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An electron impact study of HCN elimination from indole by use of 13 C labelling
Author(s) -
Corval Madeleine
Publication year - 1981
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210161005
Subject(s) - fragmentation (computing) , indole test , metastability , ion , chemistry , labelling , ring (chemistry) , carbon fibers , atom (system on chip) , crystallography , stereochemistry , materials science , organic chemistry , biochemistry , composite number , computer science , composite material , operating system , embedded system
The study of the loss of HCN from the molecular ions of [2‐ 13 C]indole and [3‐ 13 C]indole shows that, to a good approximation, only the two carbon atoms of the pentagonal ring are involved in this fragmentation process, contrary to the behaviour of the H atoms; the C‐2 atom is eliminated predominantly, chiefly in the ion source (85–90%) and a little less in the metastable energy range (75–80%). The losses of 13 CCH 3 ˙ and C 2 H 3 ˙ from the [MH 12 CN] +˙ ions of the two compounds suggest the occurrence of different structures, providing evidence for several mechanisms of HCN elimination.