摘要
直线自由能关系是化学中的一个普遍规律,为了进一步揭示直线自由能关系在配位化合物中的普遍性,我们合成了N-(对位(和邻位)取代苯基)亚氨基二乙酸p-RPhIDA和o-RPhIDA,R=Cl,H,CH_3,CH_3O),并在25.0±0.1℃,0.1mol。dm^(-3)KNO_3存在下应用pH法测定了它们的离解常数pK_1、pK_2,研究了其与铜(Ⅱ)及p-RPhIDA与镍(Ⅱ)、钴(Ⅱ)、锌(Ⅱ)等生成二元配合物的稳定性。
The dissociation constants of N-(para-substituted phenyl ) iminodiacetic acid (p-RPhID A, R = Cl, H, CH3, CH3O) and N-(ortho-substituted phenyl ) iminodiacetic acid (o- RPhlDA) and the formation constants of binary complex compounds of Cu(II)-o-RPhIDA, Cu(II)-p-RPhIDA, Co(II)-p-RPhIDA, Ni(II)-p-RPhIDA and Zn(II) - p-RPhIDA were determined by pH method in the presence 0.1mol ·dm-3 KNO3 at 25℃ . It has been found that linear free energy relationships not only exist between stability of these binary complex compounds and base strength of ligand, but also exist between logB and
The deviation of Cu(II)-o-CH3PhIDA from linearity may be ascribed to steric effect of methyl group at ortho position.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1992年第1期78-81,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金
关键词
铜
镍
锌
钴
配合物
稳定性
dissociation constant stability constant linear free energy relationship steric effect
