Many studies have shown that azines are good synthones for obtaining the heterocyclic compounds like pyrazoles, purines and pyrimidines etc. A series of acetophenone derived azines were prepared and El mass spectral studies were carried out. Formation of cyclic intermediates are strongly indicated for a number of fragments produced. Fragmentation patterns for most of the major ions are discussed. These pathways involve the initial loss of hydrogen and/or methyl group with subsequent migration of various groups like phenyl or methyl. The ortho nitro compounds undergoes the loss of the nitro group prior to the cyclization and migration of various groups. Vapor phase FT-IR were recorded and selective data are included in our report.