The infrared, Raman and ultraviolet spectra of phthalonitrile, terephthalonitrile and 2,6-dichlorobenzonitrile

Abstract
The solid-phase infrared (0-4000 cm-1) and Raman spectra, and the gas- phase ultraviolet spectra, of phthalonitrile, terephthalonitrile and 2,6-dichlorocenzonitrile have been measured and an assignment made. The ultraviolet spectra of all three compounds, particularly terephthalonitrile, are rather diffuse. For phthalonitrile, the ultraviolet spectrum has a large forbidden character with most of the intensity associated with vibronically induced transitions.

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