Preparation, structural, magnetic and thermal properties of two heterobimetallic cyano-bridged nickel(II)–copper(II)/platinum(II) coordination polymers

Two unique bimetalic Pt(II) coordination polymers of composition [Ni(hydeten)2Pt(CN)4] (Ni–Pt) and [Cu(hydeten)2Pt(CN)4] (Cu–Pt) [hydeten = N-(2-hydroxyethyl-ethylenediamine) or 2-(2-aminoethylamino)ethanol] have been synthesized and structurally characterized by various methods in this study. The crystal structure of Cu–Pt was determined by single-crystal X-ray diffraction analysis. The structure of Cu–Pt forms of infinite 2,2-TT type [–Cu(hydeten)2–NC–Pt(CN)2–CN–] chains containing paramagnetic copper atoms bridged by tetracyanoplatinate species. In this complex, Cu(II) centers display an axially elongated octahedron with two chelating hydeten molecules in the equatorial positions and N-bonded bridging cyano groups in the axial positions, whereas Pt(II) centers are four coordinate with four cyanide-carbon atoms in a square-planar arrangement. The decrease of the moments of these complexes in temperature range of 50 305 K can assigned to the antiferromagnetic interactions in the structures. The thermal decomposition of Cu–Pt comprise of five distinguished stages, while the thermal decomposition of Ni–Pt take place four different stages.