Synthesis and Catalytic Application of Metal complexes Containing Multidentate Ligand
Date Issued
2009
Date
2009
Author(s)
Hsu, Hui
Abstract
2.6-bis[bis(2-pyridylmethyl)-aminomethyl]-4-methylphenol(Hbpmp) is a special ligand which containing two tri-dentate nitrogen binding sites, and can form bimetallic complexes with various metals. Until now, there are no catalytic applications of its metal complexes on catalysis, but only crystallography and characterization on the bimetallic species. It is expected that the two metal centers will have complementary interaction between each other. In this work, we have prepared the Pd(II)-Pd(II) complex and its catalytic application. The Pd(II)-Pd(II) complex could be formed by addition of PdCl2(PhCN)2 to Hbpmp in a dichloromethane solution. Upon recrystalization in a mixed EA and methanol solution, the desired complex was obtained in pure form, which was characterized by spectroscopic and X-ray structural analyses. Hbpmp can be prepared by using bis-(2-pyridylmethyl)amine and 2,6-bis(bromomethyl)-4-phenol undergo the nucleophilic substitution in THF solution. This Pd(II)-Pd(II) complex catalyzed the Suzuki coupling by a low-loading amount of catalyst, in water and short reaction time with great yields.
Subjects
organometallic catalysis
Suzuki coupling
binuclear complex
Type
thesis
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