Synthesis of a series of Ni(dmit)2 compounds with (methylated) guanidinium cations. Comparison of structures and properties

A series of [cation][Ni(dmit)2]2 compounds was synthesized with (methylated) guanidinium cations of the type C(N(CH3)2)x(NH2)3–x (x = 0, 1, 2, 3). The crystal structure of all compounds was resolved and the intermolecular orbital overlap integrals were calculated. The conductivity of the compounds was measured from 300-100 K. All compounds behave as semiconductors in this temperature range.