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A new iron(II) coordination polymer, [FeCl(NCH)(NCH)], has been synthesized under solvothermal conditions and structurally characterized by single-crystal X-ray diffraction. This material crystallizes in the monoclinic space group C2/c, with a = 11.2850(6), b = 13.8925(7), c = 17.0988(9) Å and β = 94.300(3)º ( Z = 4). The crystal structure consists of neutral zig-zag chains, in which the iron(II) ions are octahedrally coordinated. The infinite polymer chains are packed into a three-dimensional structure through C-H···Cl interactions. Magnetic susceptibility measurements reveal the existence of weak antiferromagnetic interactions between the iron(II) ions. The effective magnetic moment, μ = 5.33 μ, is consistent with a high-spin iron(II) configuration. Graphical Abstract: The crystal structure of the coordination polymer [FeCl(NCH)(NCH)] consists of neutral zig-zag chains, in which the iron(II) ions are octahedrally coordinated.[Figure not available: see fulltext.] [ABSTRACT FROM AUTHOR]