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

摘要

Two new cyano bridged bimetallic polymeric complexes, [Ni(edbea)Ni(CN)_4]·1/2H_2O (1) and [Cu(μ-ed-bea)(μ-CN)_2 Ni(CN)_2]·H_2O (2) [edbea = 2,2'-(ethylenedi-oxy)fcw(ethylamine)] have been synthesized by adding metal chloride (M = Ni~(II) and Cu~(II)), and edbea into [Ni(CN)_4]~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 2Dpolymericchain-edbea(N5,O1)-Cul-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.