Temperature Dependence of NMR Absorption in Solid Acetic Acid and in Some of Its Chloro and Acid Chloride Derivatives

Publisher Website
Google Scholar
Abstract
Acetic acid and some of its chloro and acid chloride derivatives with increased substitution of protons by chlorine in the CH3-group were studied by NMR from −175°—0°C in order to elucidate the temperature dependence of molecular and CHnCl3−n group mobility and association in the solid state. While CH3 is free to rotate around the C–C bond, the substitution of one proton by chlorine already results in fixed CH2Cl group. In order to obtain dimeric association, however, one has to substitute two or all protons by chlorine. The rotational freedom of single molecules of such associates reappears upon heating to temperatures far below the melting point.

This publication has 3 references indexed in Scilit: