Synthesis and Structure Characterization of a Tetranuclear Manganese(Ⅲ) Complex:[Mn_4O_2(O_2CMe)_6(M

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The title compound, [Mn4O2(O2CMe)6(MeOH)2(dbm)2]·2MeCOOH·2CH2Cl2 (Hdbm = dibenzoylmethane), has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P1, with a = 10.729(3), b = 12.269(3), c = 13.085(4) , α = 106.367(3), β = 107.643(2), γ = 94.771(2)o, V = 1547.9(7) 3, Z = 1, C50H64Cl4Mn4O24, Mr = 1410.57, Dc = 1.513 g/cm3, F(000) = 724, Rint = 0.0147, T = 293(2) K and μ = 1.046 mm–1. The final R = 0.0359 and wR = 0.0938 for 5791 observed reflections with I > 2σ(I). The structure of the complex consists of one [Mn4(μ3-O)2]8+ core with four coplanar Mn atoms disposed in an extended “butterfly-like” arrangement and two O atoms triply bridging each “wing”, and the peripheral ligation is provided by six μ2-MeCO2– , two terminal μ2-dbm– groups at the two ends of the molecule, and two MeOH molecules on the central Mn atoms. Intermolecular O…H–O hydrogen bonding interactions are found within the structure of the compound. The title compound, [Mn4O2 (O2CMe) 6 (MeOH) 2 (dbm) 2] 2MeCOOH.2CH2Cl2 (Hdbm = dibenzoylmethane), has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P1 with a = 10.729 (3), b = 12.269 (3), c = 13.085 (4) , a = 106.367 (3), β = 107.643 (2), γ = 94.771 (2) o, V = 1547.9 (7) 3, Z = 1, C50H64Cl4Mn4O24, Mr = 1410.57, Dc = 1.513 g / cm3, F000 = 724, Rint = 0.0147, T = 293 (2) K and μ = 1.046 mm-1 . The final R = 0.0359 and wR = 0.0938 for 5791 observed reflections with I> 2σ (I). The structure of the complex consists of one [Mn4 (μ3-O) 2] 8+ core with four coplanar Mn atoms disposed in an extended “butterfly-like” arrangement and two O atoms triply bridging each “wing”, and the peripheral ligation is provided by six μ2-MeCO2-, two terminal μ2-dbm- groups at the two ends of the molecule, and two MeOH molecules on the central Mn atoms. Intermolecular O ... H-O hydrogen bonding interactions are found w ithin the structure of the compound.
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