The effect of substituents X OH, NH2, NH3+, Ph, C N, Cl, Br, and I in the o-, m-and p- isomers of MeOC6H4CH2X on the K and B bands have been measured and interpreted qualitatively in terms of the hypotheses of terminal and side chain group effects. For the K bands the electron migration accompanying light absorption is along the long axis of molecule so that substituents orientated para to each other are terminal groups and can ...