AN ESR STUDY ON FORMATION OF IMINOXY FREE RADICALS-SOLVENT EFFECT ON HYPERFINE SPLITTING CONSTANTS

The solvent effect on hyperfine interaction in three different types o f iminoxy radicals obtained by oxidation of di-2-pyridilketoxime (1), diethyl hydroxyimino(2-fluorophenyl)methanephosphonate (2) and isonitr osoacetophenone (3) have been analyzed. Linear correlations of hyperfi ne constants of N-14 (both iminoxyl and pyridyl nitrogens of the imino xyl derived from 1), P-31 (isomer Z of the iminoxyl derived from 2) an d F-19(both Z and E isomers of iminoxyls derived from 2) on E(T)(30) s olvent polarity parameters have been found. Opposite directions of the dependencies for different nuclei of the same radical have been estab lished. Anisotropic spectra of the radical derived from 1 and iminoxy radicals derived from alpha-furildioxime have been obtained by gamma-i rradiation of solid oximes.