Spectral and Energy Data for Bis (Polyfluoro-Aryl) Amine Complexes with Hydrogen NH…B Bond

Abstract
In the IR spectra of complexes of (C6F5)2NH, (4-CF3C6F4)2NH and (γ-NC5F4)2NH with acetonitrile, tetrahydrofurane, dimethylformamide, dimethylsulfoxide and hexametapole, the v(NH) band has a complex structure due to Fermi resonance with low-frequency vibration combinations. In the range of 15–65°C the equilibrium constants and complex formation enthalpies in CCl4 solution have been determined.