The infrared and Raman spectrum of dicyanoacetylene. The ν9 fundamental

Article abstract of DOI:10.1016/0022-2860(93)08005-O

The Raman spectrum of liquid dicyanoacetylene, NC-CC-CN, was reinvestigated and ν₃ found at 617 cm^-1.The Fermi resonance between ν₁ and 2ν₅ is explained, considering the isotopic species NC-13CC-CN.The high resolution infrared spectrum of the lowest frequency fundamental ν₉ has been recorded for the first time, and the rotational constants for several states with v₉