Studies of solute-solvent interactions. V. The solvent induced frequency shifts of the ν(C=O) and ν(C≡N) infrared bands

Hydrogen Bonding between Phenol and Acetonitrile

“…Nearly at the same time, based on the well-known Buckingham formula describing the frequency shift in a medium, Horak et al deduced that if the fundamental stretching mode ν OH of the free phenol in the gas-phase is fitted at 3655 cm -1 , it must be extrapolated in the phenol−acetonitrile complex to 3540 cm -1 , and therefore, the red shift, due to complexation, becomes equal to 115 cm -1 . That appears much smaller than we would expect, although, as we already mentioned, White and Thompson 4 revealed the red shift of 148.5−156.5 cm -1 (similar red shifts of 152 and 160 cm -1 were detected in refs and a, respectively).…”