Magnetic Relaxation by Quadrupolar Interaction of Ionic Nuclei in Non‐Aqueous Electrolyte Solutions. Part I. Limiting Values for Infinite Dilution

Abstract

A brief outline of the electrostatic relaxation theory is given which, as compared to the previous stage, contains some minor improvements. Experimental results for the magnetic relaxation rates of the nuclei ⁷Li, ²³Na, ⁸⁷Rb. ¹³³Cs. ³⁵Cl. ⁸¹Br. and ¹²⁷I in the correspondent alkali metal and halide ions are reported, which are dissolved in the solvents methanol, ethanol. formic acid, formamide. N‐methylformamide, dimethylformamide, acetone, acetonitrile and dimethylsulfoxide. The data are given as a function of the salt concentration and the extrapolation values to infinite dilution are compared with predictions from several relaxation models. The pecularity of these relaxation models is given by the nature of the solvation shell which in turn is determined by the ionic radius and the structure of the solvent. Results are also compared with thermodynamic solvation data.