Two Novel Bimetallic Cyano-Bridged Coordination Polymers Containing the 2,2′-(Ethylenedioxy)bis(Ethylamine): Syntheses, Structural, Thermal and Magnetic Properties

Abstract

Two new cyano bridged bimetallic polymeric complexes, [Ni(edbea)Ni(CN) <inf>4</inf>]·1/2H <inf>2</inf>O (1) and [Cu(μ-edbea)(μ-CN) <inf>2</inf> Ni(CN) <inf>2</inf>]·H <inf>2</inf>O (2) [edbea = 2,2′-(ethylenedioxy)bis(ethylamine)] have been synthesized by adding metal chloride (M = Ni II and Cu II), and edbea into [Ni(CN) <inf>4</inf>] 2- in water-ethanol solution and then characterized by elemental analysis, infrared (IR) and electron paramagnetic resonance (EPR) (for only complex 2) spectra, variable temperature magnetic measurement, and thermal gravimetric analysis. The X-ray diffraction crystal structure of complex 2 shows a 2D polymeric chain -edbea(N5,O1)-Cu1-N1C1-Ni(CN)2-C4N6-Cu1-(N6,O2) edbea- in which the Cu II centers are linked by two cyano and one edbea. The powder EPR spectrum of the complex 2 has shown that Cu II ions are located in rhombically distorted octahedral sites. The magnetic properties of the coordination polymers have been studied in temperature range of 15-300 K. The magnetic behaviors investigation of complexes 1 and 2 indicated the presence of a very weak antiferromagnetic interaction. © 2010 Springer Science+Business Media, LLC.