Electron spin resonance spectra of some substituted pyrazine radical anions

Abstract

Abstract The E.S.R. spectra of the anions of 2,5- and 2,6-dimethylpyrazine have been investigated and analysed. Satisfactory agreement between experimental and calculated hyperfine splittings is found if a single Q value is used to relate the spin density and the hyperfine splitting for nitrogen. In a simple MO calculation both the inductive and heteroatom models give better agreement than the hyperconjugative model. Additional informationNotes on contributorsC.A. McDowell National Research Council of Canada Senior Research Fellow, 1963–64.