Mass spectra of 1-aryl-2, 2-dibromocyclopropanes
β Scribed by Shaw-Tao Lin; Mei-Ling Lin; Wen-Chung Lin
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 305 KB
- Volume
- 25
- Category
- Article
- ISSN
- 1076-5174
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β¦ Synopsis
The electron impact (EI) mass spectra of sixteen l-aryl-2,2dibromocyclopropanes give an ion at m/z 115, the structure of which is proposed to be the indenium ion based on a collision-activated decomposition experiment.
π SIMILAR VOLUMES
Table 1. The EI mass spectra, showing peaks of >5% relative abundance (RA), of compounds 1-10, using 70 eV electrons Compound m/z (% RA) 1 315(M, 55) 314(10) 161(10) 160(89) 159(13) 107(12) 106(100) 105(11) 104(9) 91(33) 77(22) 65(15) a 2 345(M, 4) 316(7) 315(19) 314(100) 190(11) 175(7) 172(5) 160(1
## Abstract The mass spectra of 20 1,3βdithianes were studied. The fragmentation patterns including the loss of 74 u and 107 u and clearage of the substituent at Cβ2 depended strongly on the nature of the substituents at that position. 2,2βDiphenylβ1,3βdithiane undergoes an atypical fragmentation i
Fragmentation pathways of the title compounds were studied using accurate mass measurements and collision-induced dissociation spectra. Substituents in the ortho position of the aryl group at the pyrimidine ring were found to play a special role in the electron impact (EI) induced fragmentation of t