Synthesis, structural and electrical properties of [C2H10N2][(SnCl(NCS)2]2

Synthesis, structural and electrical properties are given for a new organic stannous pseudo halide material. The structure of the [C2H10N2][(SnCl(NCS)(2)](2) reveals that the adjacent Sn(II) centres are bridged by a pair of SCN- anions to form a 1-D array giving rise to the anionic chains (SnCl(NCS)(2))(n)(n-). These chains are themselves interconnected by means of N-H center dot center dot center dot Cl(S) hydrogen bonds originating from the organic cation [(NH3)(2)(CH2)(2)](2+). The AC impedance measurements were performed as a function of both frequency and temperature. The electrical conduction and dielectric relaxation have been studied. The activation energy associated with the electrical relaxation determined from the electric modulus spectra was found close to that of the activation energy obtained for DC conductivity. The conduction mechanisms are attributed to the quantum mechanical tunneling model in phase I and to the proton hopping among hydrogen vacancies in phase II. (C) 2012 Elsevier Inc. All rights reserved.