Anisotropies of the E.S.R. spin-hamiltonian parameters of the radical H₂CN in a KCl host lattice doped with K₃Ir(CN)₆

Abstract

One of the paramagnetic species formed by electron irradiation of KCl single crystals doped with K₃Ir(CN)₆ has been assigned to the radical H₂CN. The electron spin resonance spectra are anisotropic, and the anisotropies in the g-factor and in the hyperfine interactions with the hydrogens and the nitrogen nuclei are measured. The results obtained are explained by supposing that the radical is rapidly rotating about the C-N axis located at the diagonal of the KCl cubic unit cell, probably occupying tetrahedral sites and associated with positive charge-compensating ion vacancies.