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New coordination polymers based on a novel polynitrile ligand: Synthesis, structure and magnetic properties of the series [M(tcnoetOH)2(4,4′-bpy)(H2O)2] (tcnoetOH−=[(NC)2CC(OCH2CH2OH)C(CN)2]−; M=Fe, Co and Ni)

Abstract : A novel polynitrile anionic ligand, tcnoetOH−(=[(NC)2CC(OCH2CH2OH)C(CN)2]−), has been synthesized by a one-pot reaction from a cyclic acetal and malononitrile. This ligand has been successfully used to prepare, with 4,4′-bpy as co-ligand, a novel series of coordination polymers formulated as [M(tcnoetOH)2(4,4′-bpy)(H2O)2] with M(II) = Fe (1), Co (2) and Ni (3). These isostructural compounds present a linear chain structure consisting of octahedrally coordinated metal ions bridged by trans 4,4′-bpy ligands. The coordination sphere of the metal ions is completed with two terminal tcnoetOH− ligand and two water molecules. The magnetic properties indicate that the three compounds are paramagnetic, as expected from the long 4,4′-bpy bridge connecting the metal atoms. Their magnetic properties have been fitted with a model of isolated ions including a zero field splitting for the Fe(II) and Ni(II) derivatives.
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https://hal.univ-brest.fr/hal-01580537
Contributor : Nicolas Renard Connect in order to contact the contributor
Submitted on : Friday, September 1, 2017 - 4:31:42 PM
Last modification on : Monday, October 11, 2021 - 2:22:08 PM

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Samia Benmansour, Fatima Setifi, Carlos J. Gómez-García, Smail Triki, Eugenio Coronado. New coordination polymers based on a novel polynitrile ligand: Synthesis, structure and magnetic properties of the series [M(tcnoetOH)2(4,4′-bpy)(H2O)2] (tcnoetOH−=[(NC)2CC(OCH2CH2OH)C(CN)2]−; M=Fe, Co and Ni). Inorganica Chimica Acta Reviews, Elsevier, 2008, 361 (14-15), pp.3856 - 3862. ⟨10.1016/j.ica.2008.02.046⟩. ⟨hal-01580537⟩

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