Complexation of nickel-, cobalt- and copper(II) with L-3,4-dihydroxyphenylalanine-Kinetic studies

H.C.Malhotra; Hartima Chopra; Shalu Rattan; Vaishali Singh

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Complexation of nickel-, cobalt- and copper(II) with L-3,4-dihydroxyphenylalanine-Kinetic studies

机译：镍，钴和铜（II）与L-3,4-二羟基苯丙氨酸的运动学络合研究

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Kinetic study on the interaction of Ni~II, Co~II and Cu~II with L-3,4-dihydroxyphenylalamine (L-dopa) has been carried out under first order condition as a function of pH and temperature at I = 0.1 M (KNO_3). A reaction scheme costitent with the results that at pK 8.64 both amino acid hydorxyl groups undergo deprotonation, has been proposed. The overall rate constants have been resolved into stepwise rate constants. The activation parameters corresponding to stepwise rate constants, to support the proposed mechanism, have been evaluated. The suggested mechanism has been further confirmed by the calculation of water exchange rate constant.

机译：Ni = II，Co〜II和Cu〜II与L-3,4-二羟基苯丙胺（L-dopa）相互作用的动力学研究是在I = 0.1 M时随pH和温度的函数而变化的。（KNO_3）。已经提出了重要的反应方案，其结果是在pK 8.64处两个氨基酸羟己基均发生去质子化。总速率常数已解析为逐步速率常数。已经评估了与逐步速率常数相对应的激活参数，以支持所提出的机制。通过计算水交换速率常数，进一步证实了所提出的机理。

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《Journal of the Indian Chemical Society》 |2000年第5期|共4页
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H.C.Malhotra; Hartima Chopra; Shalu Rattan; Vaishali Singh;
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1. Complexation of nickel-, cobalt- and copper(II) with L-3,4-dihydroxyphenylalanine-Kinetic studies [J] . H.C.Malhotra, Hartima Chopra, Shalu Rattan, Journal of the Indian Chemical Society . 2000,第5期

机译：镍，钴和铜（II）与L-3,4-二羟基苯丙氨酸的运动学络合研究
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Complexation of nickel-, cobalt- and copper(II) with L-3,4-dihydroxyphenylalanine-Kinetic studies

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