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CHARACTERIZATION AND CATALYTIC PROPERTY OF MANGANESE(III) COMPLEXES WITH SCHIFF BASES

Two mononuclear manganese(III) complexes, [MnL (OH2)(CH3OH)] • ClO4 (1) and [MnL ] (2), where L1 and L2 are the deprotonated forms of N,N'-bis(5-chloro-2-hydroxybenzyl-idene)ethane-1,2-diamine and tris{2-[(3,5-dichlorosalicylidene)amino]ethyl}amine, respectively, are obtained by the reaction of Schiff bases with manganese perchlorate in methanol. The complexes were characterized by elemental analysis, IR spectra, and single crystal X-ray determination. In both complexes, Mn atoms are in the octahedral coordination. In the crystal structure of complex 1, the complex molecules are linked by water ligands through intermo-lecular O—H-O hydrogen bonds to form dimers. The perchlorate anions are linked to the complex molecules through intermolecular O—H- • O hydrogen bonds. In the crystal structure of complex 2, the molecules are stacked along the y axis through n---n interactions. The catalytic oxidation on olefins of the complexes is studied.

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2015. 56, 6 UDC 548.73:541.49 CHARACTERIZATION AND CATALYTIC PROPERTY OF MANGANESE(III) COMPLEXES WITH SCHIFF BASES G.-S. Li, H.-L. Zhang Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, P. R. China E-mail: gangsen_li@126.com Received June, 19, 2014 Two mononuclear manganese(III) complexes, [MnL1(OH2)(CH3OH)]ClO4 (1) and [MnL2] (2), where L1 and L2 are the deprotonated forms of N,N-bis(5-chloro-2-hydroxybenzylidene)ethane-1,2-diamine and tris{2-[(3,5-dichlorosalicylidene)amino]ethyl}amine, respectively, are obtained by the reaction of Schiff bases with manganese perchlorate in methanol. <...> The complexes were characterized by elemental analysis, IR spectra, and single crystal X-ray determination. <...> In both complexes, Mn atoms are in the octahedral coordination. <...> In the crystal structure of complex 1, the complex molecules are linked by water ligands through intermolecular O—H complex molecules through intermolecular O—H O hydrogen bonds. <...> In the crystal structure of complex 2, the molecules are stacked along the y axis through lytic oxidation on olefins of the complexes is studied. <...> DOI: 10.15372/JSC20150622 Keywords: manganese complex, mononuclear complex, Schiff base, crystal structure, catalytic oxidation of olefins. <...> A great number of metal complexes have shown interesting catalytic properties for various reactions [ 6—10]. <...> Manganese perchlorate was prepared by the reaction of manganese carbon in water, followed by recrystallization. <...> Elemental analyses were carried out using a Perkin—Elmer 2400 II elemental analyzer. <...> Infrared spectra were recorded on a Perkin—Elmer FT-IR spectrophoto Li G.-S., Zhang H.-L., 2015 O hydrogen bonds to form dimers. <...> The perchlorate anions are linked to the interactions. <...> The mixture was stirred at room temperature for 1 h and filtered. <...> The filtrate was kept still at room temperature for several days, to give deep brown block-like single crystals. <...> The mixture was stirred at room temperature for 1 h and filtered. <...> The filtrate was kept still at room temperature for several days, to give deep brown block-like single <...>
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