摘要:
AbstractPositive‐ion chemical ionization mass spectra were measured for simple bifunctional aromatic compounds of the type p‐XCH2C6H4CH2Y, where X = NH2, NH(CH3) and N(CH3)2 and Y = OH and OCH3. For each compound, essentially only three peaks of ions, [MH]+, [ MH ‐ XH] + and [MH ‐ YH] +, appeared. The B/E con stant linked‐scan spectra showed that the stable non‐decomposing [MH]+ had the proton only on the nitrogen‐containing functional group. From these data, the relative amounts of total protonation, the ratio of N‐and O‐protonation and the fraction of fragmenting [MH]+ can be calculated. The ease of protonation (protonation susceptibility) and the reactivity (fragmentation capability) of the respective functional groups are discussed.