CHARACTERIZATION AND CATALYTIC PROPERTY OF MANGANESE(III) COMPLEXES WITH SCHIFF BASES
G.-S. Li, H.-L. Zhang
Zhengzhou University of Light Industry, Zhengzhou, P. R. China
Keywords: manganese complex, mononuclear complex, Schiff base, crystal structure, catalytic oxidation of olefins, manganese complex, mononuclear complex, Schiff base, crystal structure, catalytic oxidation of olefins
Abstract
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⋯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 p⋯p interactions. The catalytic oxidation on olefins of the complexes is studied.
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