Synthesis, structures, and catalytic property of manganese(III) complexes derived from N,N'-bis(5-fluoro-2-hydroxybenzylidene)ethane-1,2-diamine

摘要

Two mononuclear manganese(III) complexes, [Mn(L)(NCS)] (I) and [Mn(L)(OH2)(2)] center dot Hfac center dot H2O (II), where L is the deprotonated form of N,N'-bis(5-fluoro-2-hydroxybenzylidene)ethane-1,2-diamine, Hfac is hexafluoroacetylacetonate, were prepared and characterized by elemental analysis, IR spectra and single crystal X-ray determination (CIF files CCDC nos. 1008309 (I), 1008310 (II)). The Mn atoms in both complexes are in octahedral coordination. Complex I crystallized in orthorhombic space group Pbca with unit cell dimensions a = 12.4090(4), b = 13.5432(5), c = 19.4637(7) , V = 3271.0(2) (3), Z = 8, R (1) = 0.0423, wR (2) = 0.0922. Complex II crystallized in triclinic space group with unit cell dimensions a = 7.6845(3), b = 88.984(2), c = 13.5522(7) , alpha = 78.369(1)A degrees, beta = 88.984(2)A degrees, gamma = 83.835(1)A degrees, V = 1237.63(9) (3), Z = 2, R (1) = 0.0526, wR (2) = 0.1421. In the crystal structure of I, the complex molecules are stack via pi a <-pi interactions along the y axis. In the crystal structure of II, the molecules are linked through intermolecular O-Ha <-O hydrogen bonds, to form chains along the x axis. The catalytic oxidation on olefins of the complexes was studied.