Abstract
A six-coordinate manganese (II) complex with the tripod ligand tris(2-benzimidazolylmethyl) amine (ntb), with composition [Mn(ntb) (4-hydroxycinnamate)](4-hydroxycinnamate) · (DMF)0.5 · (H2O)3, was synthesized and characterized by elemental and thermal analyses, electrical conductivity, IR, and UV/vis spectral measurements. The crystal structure of the complex has been determined by the single-crystal X-ray diffraction. The Mn (II) cation is bonded to an ntb ligand and a 4-hydroxycinnamate ligand through four N atoms and two O atoms, giving a distorted octahedral coordination geometry. Cyclic voltammograms of the complex indicate a quasi-reversible Mn3+/Mn2+ couple. The X-band EPR spectrum of the complex exhibits a six-line manganese hyperfine splitting pattern with g = 2, A = 95, and confirms that the material is high-spin Mn(II).
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