Premium
Mass spectra of 3(2 H )‐cinnolinone and 2‐substituted derivatives
Author(s) -
Zey Robert L.,
Gross Michael L.,
Groenewold Gary S.
Publication year - 1990
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570270218
Subject(s) - chemistry , fragmentation (computing) , mass spectrum , substituent , deuterium , vicinal , indazole , metastability , ion , spectral line , polyatomic ion , stereochemistry , medicinal chemistry , crystallography , organic chemistry , atomic physics , physics , astronomy , computer science , operating system
The mass spectrum of 3(2 H )‐cinnolinone indicates that it undergoes fragmentation in a fashion similar to other heterocyclic systems containing two vicinal nitrogens. The initial fragmentation, loss of CO, gives a 1 H ‐indazole radical cation, as was shown by deuterium labelling and metastable ion spectra. Four 2‐substituted‐3(2 H )‐cinnolinones were also studied and it was found that their fragmentation patterns are highly influenced by the substituent groups.