Unstable intermediates. Part LVIII. An electron spin resonance study of γ-irradiated group IIA chloride hydrates

Abstract

A variety of radicals have been identified by e.s.r. in γ-irradiated hydrates of Group IIA chlorides. These include a Cl₂^– centre in SrCl₂,6H₂O which is notable in having two inequivalent chlorine atoms (A_∥= 109·1 G for Cl_a and 94·9 G for Cl_b), and a centre thought to be ClOH^– in BaCl₂,2H₂O, which is isostructural with the V_K-centres. Trends in the hyperfine parameters for these and related centres are discussed in terms of the electronegativities of their constituent atoms.