Potential barriers for molecular motion in solid triethylammonium halides

Authors:

• Zdzisław Pająk,
• J. Radomski

Abstract

The proton magnetic resonance spectra of polycrystalline triethylammonium halides [(C ₂ H ₅ ) ₃ NH] ⁺ X ^- , X ^- = Cl ^- , Br ^- , I ^- are obtained over the temperature range from 77 K to 470 K. From a comparison of the experimentally and theoretically estimated second moments, reorientations of the methyl groups, ethyl groups and whole cation are evidenced. The results indicate that a significant, or even the main, contribution to the potential barriers derived for the respective motional processes arises from electrostatic interaction. © 1982.