| N,N′-双[4-(羧基亚甲氧基)亚苄基]乙二胺的酸离解常数的测定及其与金属离子的沉淀反应 |
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| 引用本文： | 童珏,刘顺,郑延华. N,N′-双[4-(羧基亚甲氧基)亚苄基]乙二胺的酸离解常数的测定及其与金属离子的沉淀反应[J]. 湘潭大学自然科学学报, 1992, 0(4) |
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| 作者姓名： | 童珏 刘顺 郑延华 |
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| 作者单位： | 湘潭大学化学系(童珏，刘顺)，湘潭大学化学系(郑延华) |
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| 摘 要： | 用PH电位滴定法测定了N,N'-双[4-(羧基亚甲氧基)亚苄基]乙二胺的酸式电离常数,并用假环效应与分子内氢键等说明了电离常数的变化,试剂对硬酸离子Th、Zr、RE、Al、Fe等生成难溶盐,探讨了沉淀的条件和沉淀条件对沉淀组成的影响,探讨了试剂用于分离Th和RE的可能性.
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| 关 键 词： | 乙二胺 金属离子 配合物 离解常数 电位滴定 |
DETERMINATION OF DISSOCIATION CONSTANT OF N,N''''-BIS [(4-CARBOXYLMETHYLENOXY) BENZILIDENE] ETHYLENE DIAMINE AND ITS PRECIPITATION REACTION WITH METAL IONS |
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| Tong Jue Liu Shun Zheng Yanhua. DETERMINATION OF DISSOCIATION CONSTANT OF N,N''''-BIS [(4-CARBOXYLMETHYLENOXY) BENZILIDENE] ETHYLENE DIAMINE AND ITS PRECIPITATION REACTION WITH METAL IONS[J]. Natural Science Journal of Xiangtan University, 1992, 0(4) |
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| Authors: | Tong Jue Liu Shun Zheng Yanhua |
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| Affiliation: | Department of Chemistry |
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| Abstract: | The dissociation constants of N,N'-bis[(4-carboxylbenzili-dene)ethylene diamine were determined by pH potentiometric method.Dueto the formation of intramolecular hydrogen bond,it can be expected thatthe dissociation constants of compounds should be less than those of th-eir mother compounds hydroxyacetic acid and benzoic acid.Their pK_avalues reduced more than 3 orders of megnitudes.The synthetic reagentis a very good precipitant for the hard acid ions,such as Fe, Al, Th,Zr,RE,U.The effects of precipitation were studied. |
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| Keywords: | ethylene diamine metal ions coordination compounds dissociation constants potentiometric methods |
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