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Mass spectral fragmentation mechanisms of some dibenzo[ c , f ][1,2] diazepines
Author(s) -
Casey Adria C.,
Green James H.,
Lee Agnes,
Mautner Michael
Publication year - 1970
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.5570070421
Subject(s) - chemistry , cinnoline , fragmentation (computing) , polyatomic ion , mass spectrum , ion , tautomer , medicinal chemistry , diazepine , derivative (finance) , stereochemistry , ring (chemistry) , organic chemistry , computer science , financial economics , economics , operating system
Abstract The fragmentation mechanisms of 11 H ‐dibenzo[ c , f ][1,2]diazepine (I), its 3,8‐dichloro derivative (II), 3,8‐dichlorodibenzo[ c , f ] [1,2]diazepin‐11‐one (III) and 3,8‐dichloro‐11 H ‐dibenzo‐[ c , f ][1,2]diazepin‐ N ‐oxide (IV) are discussed. The initial loss of molecular nitrogen is characteristic of I, II and III. Compound IV has a strong molecular ion, that competitively eliminates cither NO or Cl‐ and N 2 O. The common radical ion, m/166 e present in the mass spectra of I, fluorene, 2‐methyl‐9,10‐anthraquinone and 2‐methylbenzo[ c ]cinnoline, appears to be formed in different states.