Vibrational infrared and Raman spectra of dicyanoacetylene

Article abstract of DOI:10.1016/0584-8539(87)80128-9

The Raman and infrared spectra for solid C4N2 are reported.New assignments are given for ν₁ (2333 cm^-1), ν₂ (2267) and ν₃ (640 cm^-1).These assignments are supported by a Normal Coordinate Analysis using eight force constants.Extinction coefficients for the infrared active fundamentals are also reported.Our results suggest C4N2 to be a likely candidate to explain the 478 cm^-1 band in the Titan's emission recorded by the Voyager mission.