The infrared,Raman and mass spectra of F3C-CC-CC-CF3

The IR spectra of the vapor, liquid and solid phases of hexafluorohexa-2-diyne, F₃C-CC-CC-CF₃, were measured. The liquid phase Raman spectrum with polarizations was measured. These vibrational spectra fit D_3d selection rules, establishing that the molecule has a linear carbon skeleton. The IR spectra indicate that the -CF₃ groups rotate freely in the vapor phase, but that conformers exist in the condensed phases. The electron impact mass spectrum was measured and the molecular ion produced the strongest peak.