Electronic States of p-Benzoquinone. IV. Infrared Spectrum and Assignment of Vibrational Frequencies in the Ground Electronic State

The infrared absorption spectra of p-benzoquinone in carbon disulfide and carbon tetrachloride solutions in rock salt region are measured and interpreted together with the Raman data reported by Stammreich and Forneris. A complete, although more or less tentative, assignment of the fundamental frequencies to modes of vibrations is proposed.