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Carboxy Ester Hydrolysis Promoted by Two New Bimetallic Macrocyclic Complexes. Synthesis, Characterization and Catalytic Activity

Abstract

A dinuclear macrocyclic ligand containing [12]aneN3 and its two transition metal complexes, [Zn2L(OAc)2](ClO4)2 (1) and [Cu2L(OAc)2](ClO4)2 (2) have been synthesized and characterized on the basis of elemental analyses, molar conductivities, 1H-n.m.r, IR spectra, electronic spectra and thermal analysis. In addition, the studies on the hydrolysis of a caboxy ester, 4-nitrophenyl acetate (NA), promoted by the two complexes were also investigated. The experimental results indicated that the two complexes can efficiently catalyze hydrolysis of NA, and the kNA for complexes (1) and (2) at pH 7.25, 25 °C, were calculated to be 4.46 × 10−2 and 4.21 × 10−2 m−1 s−1, respectively, which are better than those of the corresponding mononuclear complex in the same conditions.

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Ren, YW., Guo, H., Wang, C. et al. Carboxy Ester Hydrolysis Promoted by Two New Bimetallic Macrocyclic Complexes. Synthesis, Characterization and Catalytic Activity. Transition Met Chem 31, 611–615 (2006). https://doi.org/10.1007/s11243-006-0037-x

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  • DOI: https://doi.org/10.1007/s11243-006-0037-x

Keywords

  • EtOH
  • Mononuclear Complex
  • Macrocyclic Ligand
  • Phenyl Phosphate
  • Guanidinium Salt