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为了研究三元配合物体系中的直线自由能关系,特别是配体的空间位阻的影响,本文用pH法测定了铜(Ⅱ)—杂环芳香碱与第二配体N-取代乙二胺形成三元配合物的稳定常数及第二配体的质子化常数,报道了三元配合物的稳定性与第一配体杂环芳香碱的酸碱强度之间和第二配体取代基空间位阻E_s之间存在线性关系。
In order to study the relationship between the linear free energy in the ternary complex system, especially the steric hindrance of the ligand, the effects of copper (Ⅱ) -heterocyclic aromatic base and the second ligand N-substituted ethylene di The stability constants of the amine-forming ternary complex and the protonation constants of the second ligand reported that the stability of the ternary complex with the acid-base strength of the first ligand heterocyclic aromatic base and that of the second ligand substituent There is a linear relationship between steric hindrance E_s.