Electronic Spectra of Substituted Aromatic Hydrocarbons. II. Naphthols and Naphthylamines

The ultraviolet absorption spectra of α-, β-naphthols and α-, β-naphthylamines have been newly measured down to 200 mμ. On the basis of a calculation which was carried out in the same manner as in the preceding paper, the effect of substitutions at α- and β-positions upon the spectrum of napthalene has been explained and the assignment of the observed absorption bands has been made. It is suggested that, upon substitution at the α-position, the Au→B3u+ band of naphthalene splits into two electronic bands because of the interaction of the B3u+ state with a B1g+ state. Molecular diagrams are given for naphthylamines and for aniline.