Abstract
The electron ionization (EI) and ammonia chemical ionization [CI (NH 3 )] mass spectral studies on 2-phenyl acetophenone semicarbazone are reported. The El spectrum shows a clearly identifiable molecular ion peak of weak intensity at m/z 253 and the base peak is observed at m/z 77. The CI (NH 3 ) spectrum is characterized by strong MH+ signal at m/z 254.corresponding to the base peak. The primary fragmentations of significance include the loss of NH 3 , H 2 NCO, H 2 NCONH, H 2 NCONHN and C 6 H 5 CH 2 . Fragmentation processes are discussed and rationalized. KEY WORDS: 2-phenyl acetophenone, semicarbazone, electron ionization, chemical ionization, fragmentation. Global Jnl Pure & Applied Sciences Vol.10(1) 2004: 81-85
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