Mass Spectral Fragmentation Patterns of Some Substituted 10,Ll-Dihydro-5H-Dibenzo[A,D] Cycloheptene-5-One and 9,10-Dihydro-4H-Benzo [4,5]Cyclohepta[1,2-B]Thiophene-4-One
作者:
Grace Karminski-zamola,
Zvonimira Mikotić-Mihun,
Miaden Lirvić,
Ivica Cepanec,
Jasmina Ranilović,
期刊:
Spectroscopy Letters
(Taylor Available online 1999)
卷期:
Volume 32,
issue 4
页码: 601-613
ISSN:0038-7010
年代: 1999
DOI:10.1080/00387019909350009
出版商: Taylor & Francis Group
关键词: Mass spectra;substituted 10,11-dihydro-5H-dibenzo [a,d]cycloheptene-5-one and 9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-one
数据来源: Taylor
摘要:
Electron impact mass spectra of some substituted 10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-one and 9,10-dihydro-4H-benzo[4,5] cyclohepta[1,2-b] thiophene-4-one have been recorded and the identity of various ions in the mass spectra established. Substituted dibenzosuberones (2-6) exhibit one main fragmentation route, which include the elimination of the tropolone molecule from the dibenzosuberone fragment cation. Their monothiophene analogues(7-11) exhibit characteristic CO elimination from the molecular ion and formation of corresponding naphtho[1,2-b]thiophene radical cation which after elimination of CS or HCS from the thiophene nuclei give rise to the benzotrophyne radical cation.
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