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Kinetics of hydrolysis of amino acid esters in presence of aquocomplexes involving ethylenediamine, diethylenetriamine and triethylenetetramine ligands. Part 1-copper(II) and nickel(II)

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Summary

Aquocomplexes of copper(II) and nickel(II) involving (H2NCH2)2, H2NCH2CH2NHCH2CH2NH2 and H2NCH2CH2NHCH2CH2NHCH2CH2NH2 as ligands were prepared and characterised. Using a pH-stat method, the kinetics of the base hydrolysis of amino acid esters such as H2NCH2CO2CH3·HCl (GE), (HO)C6H4CH2-(NH2)CO2CH3·HCl (TE), CH3S(CH2)2CH(NH2)CO2CH3· HCl (ME), HSCH2CH(NH2)CO2C2H5·HCl (CE), \({\text{CH}}_{\text{2}} {\text{CH(NH}}_{\text{2}} ){\text{CO}}_{\text{2}} {\text{CH}}_{\text{3}} \cdot 2{\text{HCI (HE)}}\)(HE) and [—SCH2CH(NH2)CO2CH3]2·2HCl (CysE) was studied. These complexes substantially enhance the rate of hydrolysis, the values of the second-order rate constants being some 10–30 times greater than those obtained in the presence of simple metal ions.

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Authors and Affiliations

  1. Department of Chemistry, Rajshahi University, 6205, Rajshahi, Bangladesh

    H. Chakraborty & M. L. Rahman

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  1. H. Chakraborty
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  2. M. L. Rahman
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Chakraborty, H., Rahman, M.L. Kinetics of hydrolysis of amino acid esters in presence of aquocomplexes involving ethylenediamine, diethylenetriamine and triethylenetetramine ligands. Part 1-copper(II) and nickel(II). Transition Met Chem 18, 545–547 (1993). https://doi.org/10.1007/BF00191117

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  • DOI: https://doi.org/10.1007/BF00191117

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