Preparation, structural, magnetic and thermal properties of two heterobimetallic cyano-bridged nickel(II)-copper(II)/platinum(II) coordination polymers |
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Authors: | Ahmet Karada? Ay?egül ?enocak Yusuf Yerli A Cemil Ba?aran |
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Institution: | a Chemistry Department, Gaziosmanpasa University, 60240 Tokat, Turkey b Department of Physics, Faculty of Science, Gebze Institute of Technology, 41400, Turkey c Department of Chemistry, Faculty of Art and Sciences, Atatürk University, 25240 Erzurum, Turkey |
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Abstract: | 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. |
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Keywords: | Cyano-bridged complexes Nickel(II) Copper(II) Platinum(II) Magnetic properties Thermal analysis |
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