Synthesis, structure and dielectric properties of two Cr(III)-tetrazole complexes Cr2(2-TPY)4(HO)2 and Cr(2-TPY)2(H2O)Cl

► Compound 1 was the first dinuclear Cr(III)-tetrazole crystal. ► The dielectric properties of Cr(III) complexes have been studied for the first time. ► The crystal samples to compounds 1 and 2 showed interesting dielectric properties.