| 2-乙基己基膦酸单(2-乙基己基)酯-H2SO4-钴(Ⅱ)、镍(Ⅱ)萃取体系中所形成的配合物研究 |
| STUDY ON COMPLEXES FORMED IN 2-ETHYL-HEXYL PHOSPHONIC ACID MONO-2-ETHYLHEXYL ESTER-H2SO4-Co(Ⅱ) OR Ni(Ⅱ) EXTRACTION SYSTEM |
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| 摘要: 制备了一元酸性磷(膦)酸酯类萃取剂(HL)二(2-乙基已基)磷酸(P-204)和2-乙基已基膦酸单(2-乙基已基)酯(P-507)与钴(Ⅱ)、镍(Ⅱ)的配合物。通过元素分析、水含量测定、热重分析、红外和电子光谱及磁矩测定就二种萃取剂与钴、镍配合物的组成、性质和立体构型进行了比较研究。结果表明,二种配体所形成的配合物是相似的。深兰色的钴配合物CoL2为四面体构型。棕色的镍的无水配合物NiL2和绿色的含水配合物NiL2·2H2 |
| 关键词: 二(2-乙基已基)磷酸 2-乙基已基磷酸单(2-乙基己基)醋 镍(Ⅰ) 钴(Ⅰ) 配合物 |
| 基金项目: |
| Abstract: The complexes of monoacidic organophosphorus extractants(HL)di(2-ethylhexyl) phosphoric acid and 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester with Co(Ⅱ) and Ni(Ⅱ) were prepared. The composition, nature and steric configuration of these complexes were examined by elementary analysis, measurement of water content, TGA, IR and electronic spectroscopy as well as magnetic moment determination. The results indicated that the complexes formed by these two ligands are similar. The deep blue cobalt complex CoL2 belongs to tetrahedral configuration. The nickel complexes exhibit thermochromism, and their composition and color are variable when they are in contact with moisture; the brown anhydrous Ni complex turns deep blue on heating, and turns green color when it absorbs water from the air. The composition of the brown and the green Ni complexes were proved to be NiL2 and NiL2·2H2O, respectively, and they all belong to octahedral configuration. The conversion of these three complexes one another is reversible. In all these complexes, the acidic organophosphorus ligands are bonded with metal ions by the oxygen atoms in POO- group. It was proved that the extent of the covalence of the bonding between the ligand and the metal ion in the tetrahedral Co complexes is larger than that in the octahedral Ni complexes. |
| Keywords: di(2-ethylhexyl) phosphoric acid 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester cobalt(Ⅱ) nicke(Ⅱ) complex |
| 投稿时间：1987-04-10 |
| 摘要点击次数: 1932 |
| 全文下载次数: 1314 |
| 许庆仁,蒋亚东.2-乙基己基膦酸单(2-乙基己基)酯-H2SO4-钴(Ⅱ)、镍(Ⅱ)萃取体系中所形成的配合物研究[J].无机化学学报,1988,4(3):14-19. |
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