高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 22.

• 研究简报 • 上一篇    下一篇

金属萃取平衡与软-硬酸碱规则

杨天林1, 杨永会2, 孙思修2, 宋其圣2, 孙绚2   

  1. 1. 宁夏大学化学系, 银川 750021;
    2. 山东大学化学学院, 济南 250100
  • 收稿日期:1997-10-28 出版日期:1999-01-24 发布日期:1999-01-24

The Extraction Equilibrium and the HSAB Rule

YANG Tian-Lin1, YANG Yong-Hui2, SUN Si-Xiu2, SONG Qi-Sheng2, SUN Xuan2   

  1. 1. Department of Chemistry, Ningxia University, Yinchuan, 750021;
    2. Department of Chemistry, Shandong University, Jinan, 250100
  • Received:1997-10-28 Online:1999-01-24 Published:1999-01-24

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被引次数

19

摘要： 软硬酸碱规则从宏观角度描述化合物的形成及性质,在配合物稳定性的判断方面有广泛应用.前文[1]报道了萃取速率常数与金属离子的软硬酸碱强度的关系,本文研究了萃取平衡常数与金属离子的软硬酸碱强度的关系.

关键词: 二-(2-乙基己基)磷酸, 萃取平衡, 软-硬酸碱规则, 金属离子

Abstract: The extraction equilibrium of Fe(Ⅲ), Be(Ⅱ), Mn(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ), Pb(Ⅱ)and Cd(Ⅱ)from nit rate medium with di-(2-et hylhexyl)pHospHoric acid (HDEHP)in kerosene were st udied at(298±1)K.The correlation between The extraction equi-librium constants of Metalions and The HSAB rule was discussed.The experimental results indi-cate that Their Kexand ΔG ○ are increasing with The increase of hardness of Lewis acid.

Key words: Di2(2-et hylhexyl)phosphoric acid, Extraction equilibrium, Rule of hard and soft acids and bases(HSAB), Metalions

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