Abstract
A heterobimetallic cyano-bridged 1D coordination polymer of the composition [Ni(baepn)(μ-NC)Fe(CN)3(NO)(μ-CN)]n·3H2O has been synthesized by the reaction of nickel(II) nitrate hexahydrate, baepn (baepn = N, N′-bis(2-aminoethyl)-1,3-propanediamine), and sodium nitroprusside dihydrate in a methanol–water mixture. The complex was characterized by physicochemical and spectroscopic methods. The crystal structure was established by single-crystal X-ray diffraction analysis. It reveals cyano-bridged heterometallic chains consisting of alternating arrays of Ni(II) and Fe(II) atoms, both being embedded in distorted octahedral environments. Low-temperature susceptibility measurements show the presence of weak antiferromagnetic exchange interactions between paramagnetic Ni(II) centers (J = −0.46 cm−1) through long diamagnetic [Fe(CN)5(NO)]2− bridges. Spin state of the iron atom was established by 57Fe Mössbauer spectroscopy.
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P.T. and S. M. gratefully acknowledge the financial support from Council of Scientific and Industrial Research (CSIR), New Delhi, Government of India. S.S. is grateful to the Department of Chemistry, Krishnagar Government College, for providing computer facilities.
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Talukder, P., Shit, S., Nöth, H. et al. A bimetallic cyano-bridged complex based on nickel(II) and pentacyanidonitrosylferrate(II) precursors: characterization, crystal structure, and magnetic properties. Transition Met Chem 37, 71–77 (2012). https://doi.org/10.1007/s11243-011-9559-y
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DOI: https://doi.org/10.1007/s11243-011-9559-y