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    Title: Structure, Magnetic Properties and Catalase-like Activity of Asymmetric Dimanganese(Ⅲ,Ⅲ) Carboxylate Complexes with Salicylaldimine Ligands
    Authors: 張國輝;Chang, K. H.;魏和祥;Wei, Ho-hsiang;洪當明;Hong, D. M.
    Contributors: 淡江大學化學學系
    Keywords: Manganese compounds;Crystal structures;Magnetic properties;Catalase-like activity
    Date: 1999-12-01
    Issue Date: 2013-07-29 13:46:06 (UTC+8)
    Publisher: 臺北市:中國化學學會
    Abstract: The crystal structures, magnetic properties, and catalase-like activities of assymmetric dinuclear manganese(III,III) complexes, [Mn2III,III(spa)2(m-Me3CCO2)(Me3CCO2)(CH3OH)] (1) and [Mn2III,III(vpa)2(m-Me3CCO2)(Me3CCO2)(CH3OH)] (2), (H2spa = 3-salicyclideneamino-1-propanol, H2vpa = O-vanillin), were reported. The crystal structures of complexes 1 and 2 consist of the same discrete asymmetric coordination environment of dinuclear clusters, where the two manganese atoms are bridged by two alkoxo oxygens of the spa or vpa ligands and one bidentate carboxylate ion, whereas an additional oxygen atom of monodentate carboxylate coordinated to the first metal ion, and the second metal ion was coordinated by one oxygen atom of the solvent CH3OH. Magnetic investigations (2-300 K) reveal an intramolecular antiferromagnetic spin exchange interaction with axial-field splittings: J = -12.3 cm-1 (D = -0.10 cm-1) and J = -13.3 cm-1 (D = -0.15 cm-1) for complexes 1 and 2, respectively. The complexes should show catalase-like activity for H2O2 disproportionation in CH3OH solvent at 25° with rate constants of k = 6.35 dm3mol-1s-1 and 6.20 dm3mol-1s-1 for complexes 1 and 2, respectively.
    Relation: Journal of the Chinese Chemical Society=中國化學會會誌 46(6), pp.911-916
    DOI: 10.1002/jccs.199900124
    Appears in Collections:[化學學系暨研究所] 期刊論文

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