METAL CHELATING AGENTS IV: ELECTRON IONIZATION AND CHEMICAL IONIZATION MASS SPECTRA OF 2- PHENYL ACETOPHENONE SEMICARBAZONE
AbstractThe electron ionization (EI) and ammonia chemical ionization [CI (NH3)] 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 (NH3) 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 NH3, H2NCO, H2NCONH, H2NCONHN and C6H5CH2. 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