Effect of anion and isotope substitution on physical properties of organic metals series ET2[Hg(SCN)3-nXn], where X=Cl,Br,I; n=1,2

A significant effect of the anion and isotope substitution on ESR parameters of the titled family is described. These compounds form a class of similar metal-like salts with κ-type packing of ET molecules and polymeric anions. The deuterated chlorine containing salt reveals the β-structure of ET sheets. The differences in temperature dependencies of ESR parameters for these salts are attributed to the peculiarities of the dimerized cationic sheets and the modification of SCN and halogen functioning in anion composition.