Cyclohexadienyl Radicals in γ-Irradiated <i>catena</i>-μ-Ethylenedi aminecadmium(II) <i>catena</i>-Tetra-μ-cyanomercurate(II)–Benzene (1/2) and the Analogous Clathrates

Abstract

Abstract Cyclohexadienyl radicals produced by γ-ray irradiation are thermally stable up to 423 K in the mother benzene clathrates Cd(en)Hg(CN)4·2C6H6, Cd(en)Cd(CN)4·2C6H6, Cd(tn)Hg(CN)4·2C6H6, and Cd(NH3)2Hg(CN)4· 2C6H6. However, no thermally stable C6H7· radicals have been observed in Cd(NH3)2Ni(CN)4· 2C6H6 and Cd(en)Ni(CN)4·2C6H6 even immediately after irradiation. The ESR spectra of C6H7· show the hyperfine splitting constants of the methylene, para, ortho, and meta protons 48, 13, 9, and 3 G, respectively.