The determination of the stability constants of mixed ligand complexes of adenine and amino acids with Ni(II) by potentiometric titration method

Ammar R.A.; Al-Mutiri E.M.; Abdalla M.A.

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The determination of the stability constants of mixed ligand complexes of adenine and amino acids with Ni(II) by potentiometric titration method

机译：电位滴定法测定腺嘌呤与氨基酸混合配体与Ni（II）的稳定性常数

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A potentiometric titration technique has been used to determine the stability constants for the various complexes of Ni(II) with adenine (A) as primary ligand and selected amino acids (L) as secondary ligands. Ternary complexes of amino acids are formed in a stepwise mechanism, whereby (A) binds to Ni(II), followed by interaction with ligand (L), whereas thiol-containing ligands form ternary complexes through a simultaneous mechanism. The formation constants of the complexes were determined at 25°C and ionic strength 0.1M NaNO_3. The relative stabilities of the ternary complexes are compared with those of the corresponding binary complexes in terms of ΔlogK values. The concentration distribution of the complexes are evaluated.

机译：电位滴定技术已用于确定Ni（II）与腺嘌呤（A）作为主要配体和所选氨基酸（L）作为次要配体的各种配合物的稳定性常数。氨基酸的三元络合物是逐步形成的，其中（A）与Ni（II）结合，然后与配体（L）相互作用，而含硫醇的配体通过同时的机理形成三元络合物。在25℃和离子强度0.1M NaNO_3下测定复合物的形成常数。根据ΔlogK值，将三元络合物的相对稳定性与对应的二元络合物的相对稳定性进行比较。评价复合物的浓度分布。

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来源
《Fluid Phase Equilibria》 |2011年第1期|共5页
作者
Ammar R.A.; Al-Mutiri E.M.; Abdalla M.A.;
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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
关键词
Adenine; Amino acids; Mixed complexes;

机译：腺嘌呤;氨基酸;混合配合物;

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1. The determination of the stability constants of mixed ligand complexes of adenine and amino acids with Ni(II) by potentiometric titration method [J] . Ammar R.A., Al-Mutiri E.M., Abdalla M.A. Fluid Phase Equilibria . 2011,第1期

机译：电位滴定法测定腺嘌呤与氨基酸混合配体与Ni（II）的稳定性常数
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The determination of the stability constants of mixed ligand complexes of adenine and amino acids with Ni(II) by potentiometric titration method

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