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

摘要

The solvent effect on hyperfine interaction in three different types of iminoxy radicals obtained by oxidation of di-2-pyridilketoxime (1), diethyl hydroxyimino(2-fluorophenyl)methanephosphonate (2) and isonitrosoacetophenone (3) have been analyzed. Linear correlations of hyperfine constants of ~(14)N (both iminoxyl and pyridyl nitrogens of the iminoxyl derived from 1), ~(31)P (isomer Z of the iminoxyl derived from 2) and ~(19)F (both Z and E isomers of iminoxyls derived from 2) on E_T (30) solvent polarity parameters have been found. Opposite directions of the dependencies for different nuclei of the same radical have been established. Anisotropic spectra of the radical derived from 1 and iminoxy radicals derived from α-furildioxime have been obtained by γ -irradiation of solid oximes.