Mass spectra of nitro-beta,beta-dihalostyrenes |
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Authors: | Lin Shaw-Tao Lee Chun-Jen Chen Li-Chwen Huang Keh-Feng |
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Institution: | Department of Applied Chemistry, Providence University, Sha-Lu, Taichung Hsien, Taiwan 433. sdlin@pu.edu.tw |
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Abstract: | The electron ionization (EI) fragmentation of nitro-beta,beta-dihalostyrenes depends strongly on the specific halogens present as well as on the position of the nitro group. Beta,beta-difluorostyrenes yielded mainly fluoroacetylene ions as the base peaks and o-nitro-beta,beta-dihalostyrene possibly furnished the ion with a structure similar to that of benzoa]isoxazole (11). The structural identity of the ion was verified by comparing the collision-induced dissociation (CID) spectra of m/z 119 ions from p- and o-nitro-beta,beta-difluorostyrene, o-nitro-beta,beta-dibromostyrene and compound 11. |
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