抄録
Mass spectra of substituted benzaldehydes, substituted benzyl ethyl ethers, diethyl substituted benzaldehyde acetals and substituted benzaldehyde ethylene acetals were measured by electron impact ionization. The substituted group of compounds were H; o-, m-, p-CF3O;o-, m-, p-CH3, and o-, m-, p-CI. The fragmentation patterns were discussed on the basis of the metastable ions and the fragment of isomer.