Abstract

An N-ethylthiourea (Etu)–symmetric diethylformamidine disulfide redox system is studied via potentiometry. The potentials of the system in a temperature range of 273–338 K are determined using a platinum electrode. The Bjerrum function of formation is calculated for the reaction [ReOCl₅]^2– + iEtu = [ReOCl_5-iEtu_i]^– + iCl^–; K_i (i = 0–5) in a medium of 6 M HCl. The stability constants of Re(V) oxochloro-N-ethylthiourea complexes are determined. A regular pattern of changes in the stepwise stability constants of the complexes upon a rise in temperature is found and thermodynamic values of complexation reactions are determined.

中文翻译：

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温度对 Re(V) 与 N-乙基硫脲配合物稳定性的影响

摘要

一个Ñ -ethylthiourea（ETU） -对称diethylformamidine二硫化物氧化还原系统是通过电势的影响。系统在 273-338 K 温度范围内的电位使用铂电极确定。计算用于该反应形成的Bjerrum函数[ReOCl ₅ ] ^2- +我ETU = [ReOCl _5-我ETU_我] ^- +我氯^- ; K _i ( i = 0–5) 在 6 M HCl 介质中。Re(V)氧代氯-N的稳定常数测定-乙基硫脲复合物。发现了温度升高时配合物的逐步稳定性常数变化的规律模式，并确定了配合反应的热力学值。