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 |
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Authors: | Grace Karminski-zamola Zvonimira Mikotić-Mihun Miaden Lirvić Ivica Cepanec Jasmina Ranilović |
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Affiliation: | 1. Department of Organic Chemistry, Faculty of Chemical Engineering and Technology , University of Zagreb , MaruliCev trg 20, 10000 , Zagreb , Croatia;2. Belupo Ltd. Pharmaceuticals and Cosmetics , Radni?ka cesta 224, 10000, Zagreb , Croatia;3. Podravka, Food Processing Industry , Ante Star?evi?a 32, 48000 , Koprivnica , Croatia |
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Abstract: | 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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Keywords: | 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 |
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