Low-dimensional compounds containing cyano groups. XVIII. Two-dimensional network made of [Cu(tmen)]2+ moieties (tmen = tetramethylethylenediamine) connected by [Pt(CN)4]2− anions with three different bridging cyano groups

The polymeric complex, {[Cu(tmen)][Pt(CN)4]}n (tmen = tetramethylethylenediamine) has been synthesized and characterized by elemental analysis, infrared spectroscopy, single-crystal structure analysis and by measurement of magnetic properties. Four ν(C triple bond; length of mdash N) absorption bands have been recorded in the infrared spectrum of this compound, what corresponds with four different types of cyano groups in the structure. Crystal structure revealed that one cyano group is terminal whereas three crystallographically different cyano groups of [Pt(CN)4]2− anions bridge Pt(II) and Cu(II) atoms to form a two-dimensional structure with a weak antiferromagnetic exchange coupling.