The Ultraviolet Absorption Spectrum of Benzonitrile Vapor

The ultraviolet absorption spectrum of benzonitrile vapor has been investigated, and many of the observed bands have been accounted for in terms of ground and excited state frequencies. The data obtained were compared with the data available from infra-red absorption spectra, the Raman effect, and early work on ultraviolet absorption spectra. The spectrum of benzonitrile vapor was shown to resemble closely the spectra of other monosubstituted benzenes, particularly in the spacing of the excited state bands from the zero-zero band.