Solvatochromism of Heteroaromatic Compounds:XXIII.Reversible Specific Solvatochromic Effect in the IR Spectra of 2-Nitrophenol and 2,4,6-Trinitrophenol

摘要

2-Nitrophenol and 2,4,6-trinitrophenol form with protophilic solvents complexes with a bifurcate (three-center)hydrogen bond.Their O-H stretching vibration frequencies nonlinearly and unsteadily vary with the H-bond acceptor ability of the medium,which is a spectroscopic evidence for three-center H-complex formation.