L-苏糖酸与金属离子的配位性能
COORDINATION REACTION OF L-THREONIC ACID WITH METAL IONS
作者单位
孙祥德 南开大学化学系天津 300071 
殷向晨 南开大学化学系天津 300071 
朱守荣 南开大学化学系天津 300071 
林华宽 南开大学化学系天津 300071 
延玺 南开大学化学系天津 300071 
孙宏伟 南开大学化学系天津 300071 
陈荣悌 南开大学化学系天津 300071 
摘要: 本文在298K、I=0.1 mol·L-1 KNO3条件下测定了L-苏糖酸的质子化常数及其与钙(Ⅱ)、镉(Ⅱ)、锌(Ⅱ)、钴(Ⅱ)、铜(Ⅱ)二元配合物的生成常数。L-苏糖酸的质子化常数与葡萄糖酸的质子化常数一致,pKa为3.56。其与金属离子的配位方式也与葡萄糖酸一致,但其二元配合物的生成常数明显比葡萄糖酸大。L-苏糖酸与不同金属离子作用的方式不同,与钙(Ⅱ)、镉(Ⅱ)、锌(Ⅱ)、钴(Ⅱ)配位时不解离出醇羟基质子,而与铜(Ⅱ)配位时则
关键词: L-苏糖酸 配合物 稳定性
基金项目: 
Abstract: The protonation of L-threonic acid and complex formation constant of L-threonic acid with calcium(Ⅱ), cadmium(Ⅱ), zinc(Ⅱ), cobalt(Ⅱ) and copper(Ⅱ) binary complex were determined at 298K, I=0.1 mol·L-1 KNO3. The protonation constant of L-threonic acid (logK=3.56) is the same as gluconic acid. Complex formation constant are obviously larger than that of gluconate complex. Proton of alcoholic hydroxyl does not dissociate when coordinated to Ca(Ⅱ), Cd(Ⅱ), Zn(Ⅱ) and Co(Ⅱ). However, alcoholic proton was dissociated with pKa 6.07 when corrdinated to Cu(Ⅱ). The formation constants are : Calcium(Ⅱ), 1.74(110); Cd(Ⅱ), 4.63(120); Zn(Ⅱ), 2.00(110); Co(Ⅱ), 2.29(110); Cu(Ⅱ), 3.65(110), -2.42(11-1), -5.41(12-2)..
Keywords: L-threonic acid complex formation constant
 
摘要点击次数:  1321
全文下载次数:  2051
孙祥德,殷向晨,朱守荣,林华宽,延玺,孙宏伟,陈荣悌.L-苏糖酸与金属离子的配位性能[J].无机化学学报,1998,14(1):109-113.
查看全文  查看/发表评论  下载PDF阅读器
Support information: