Synthesis, characterization and catalytic activity of three palladium(II) complexes containing Schiff base ligands |
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| Authors: | Hai-Fu Guo Yong Pan De-Yun Ma Kuan Lu Liang Qin |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, People??s Republic of China
2. College of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia, 010051, People??s Republic of China
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| Abstract: | Three new Pd(II) complexes of Schiff base ligands, namely, [Pd4(L1)4] (1), [Pd2(L2)2Cl2] (2) and [Pd(L3)2Cl2] (3) [HL 1 ?=?N-(benzylidene)-2-aminophenol; L 2 ?=?N-(2,4-dichlorobenzylidene)-2,6-diethylbenzenamine, L 3 ?=?4-(2,4-dichlorobenzylide-neamino)phenol] have been synthesized using solvothermal methods and characterized by elemental analysis, spectroscopy and single crystal X-ray diffraction. The crystal structures of the free ligands were also determined. The ??-oxygen-bridged tetranuclear cyclometallated Pd(II) complex (1) contains four nearly planar units, in which PdII is four-coordinate. Complex 2 is a ??-chloro-bridged dinuclear cyclometallated Pd(II) complex, whereas complex 3 is mononuclear. The Heck reactions of bromobenzene with acrylic acid catalyzed by complexes 1?C3 have also been studied. |
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