The equilibrium and the vibrational spectra of the t-butylamine-chloroform system.

概要

論文の詳細を見る
The thermodynamic constants, ΔH° and ΔS°, of the t-butylamine (TBA)–chloroform-d system in carbon tetrachloride are obtained from the analysis of the Raman intensities observed in the C–D stretching region of chloroform-d, while the ΔH° on the associated species of TBA·CDCl3 and (TBA)2·CDCl3 are evaluated to be −14.2 and −22.6 kJ/mol respectively. The IR or Raman spectrum of a solid sample, adjusted by the rapid cooling of a gaseous or liquid one respectively, with the TBA: chloroform ratio of ≈1 is compared with that of TBA in the gaseous, liquid, or solid state; it is confirmed, on the basis of the assignments of the observed frequencies, that the solid sample consists almost entirely of the associated species of TBA·CHCl3. Only one associated species of (TBA)2·CHCl3 is also obtained by the crystallization of the gaseous sample with the molar ratio of 2.0. The NH2 group vibrations in TBA·CHCl3 or (TBA)2·CHCl3 are related intimately in their frequencies and band shapes to those in gaseous or solid TBA respectively.
公益社団法人日本化学会の論文