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RESEARCH PRODUCT

Structural Characterization and Magnetic Properties of the First 2,2‘-Bipyrimidine-Containing Iron(III) Complexes

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Two new iron(III) complexes of the formulas [Fe(bpm)Cl3(H2O)]·H2O (1) and [Fe2(bpm)Cl6(H2O)2]·2H2O (2) (bpm = 2,2‘-bipyrimidine) have been synthesized and their crystal structures determined by single-crystal X-ray diffraction. 1 and 2 crystallize in the monoclinic system, space group P21/n, with a = 8.593(2) A, b = 17.669(4) A, c = 8.928(2) A, β = 102.36(2)°, and Z = 4 for 1 and a = 6.422(3) A, b = 11.999(4) A, c = 12.297(6) A, β = 93.82(4)°, and Z = 2 for 2. The structure of complex 1 is made up of neutral [Fe(bpm)Cl3(H2O)] mononuclear units and water molecules of crystallization. The monuclear units are linked through hydrogen bonds involving the coordinated water molecule and one of the chlorine atoms yielding a uniform chain. The iron(III) is hexacoordinate, with two nitrogens of a chelating bpm, three chlorine atoms, and one water molecule building a distorted octahedron around the metal atom. The structure of 2 consists of centrosymmetric bpm-bridged dinuclear [Fe2(bpm)(Cl6)(H2O)2] units and water ...