Abstract
The temperature dependence of the spin-Hamiltonian (s-H) parameters of the ESR spectra of liquid and glassy solutions of some copper and vanadyl compounds has been investigated. It is shown that in the case of non-coordinating solvents the temperature dependence is not affected by such factors as viscosity, molecular geometrical dimensions and free ligand concentration in solution that strongly influence intermolecular exchange in coordinating solvents. The temperature variations of s-H parameters in the liquid and crystal states of copper diethyldithiocarbamate have been compared. The influence of pressure on the ESR parameters of copper and vanadyl in liquid solutions has been investigated. The measurements show that temperature variations of the s-H parameters of the ESR spectra of solutions of copper and vanadyl in non-coordinating solvents are the results of intramolecular heat effects.
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