摘要：

The vacuum ultraviolet absorption spectra of anilne, N-methylaniline, N-ethylaniline, N,N-dimethylaniline, N,N-diethylaniline and N-n-butylaniline have been measured in the vapor phase by a recording vacuum ultraviolet spectrophotometer, with which the absorption measurements have been extended down to 1500 . Some new bands have been found in the vacuum ultraviolet region, and in total five π→π* transtion bands with molar extinction coefficients larger than 1500 have been observed commonly for the anilines. In order to clarify the nature of these bands, a theoretical treatment has been made by considering the configuration interaction among the ground, locally excited and charge-transfer configrations. An excellent agreement has been obtained between the experimental and the calculated result. It has been concluded the the anilines studied here exhibit intramolecular charge-transfer bands characteristic if the electron trasfer interaction between the substituent and benzene ring.

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