Abstract
Using the tetracyanometalate precursor [Fe(4,4′-dmbipy)(CN) 4] - (4,4′-dmbipy = 4,4′-dimethyl-2,2′-bipyridine) as the building block, two new cyano-bridged one-dimensional heterobimetallic coordination polymers, [M(CH 3OH) 2Fe 2(4,4′-dmbipy) 2(CN) 8] n (M = Cu, 1; Mn, 2), have been synthesized and structurally characterized. X-ray crystallography reveals that complexes 1 and 2 consist of heterobimetallic chains of squares, and the central M II ion is six-coordinated as an elongated distorted octahedral geometry. Magnetic studies show ferromagnetic coupling between Fe III and Cu II ions in complex 1. Complex 2 exhibits ferrimagnetic behavior caused by the noncompensation of the local interacting spins ( S Mn = 5/2 and S Fe = 1/2), which interact antiferromagnetically through bridging cyanide groups. magpack program has been employed to investigate the magnetic nature of squares chain structure.
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