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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CoL_2为四面体构型。棕色的镍的无水配合物NiL_2和绿色的含水配合物NiL_2·2H_2O对均为八面体构型。四面体钴配合物中键的共价性程度大于八面体的镍配合物。
A series of monobasic acid phosphates such as bis (2-ethylhexyl) phosphate (P-204) and 2-ethylhexylphosphonic acid mono (2-ethylhexyl) (P-507) and cobalt (Ⅱ), nickel (Ⅱ) complexes. By means of elemental analysis, water content determination, thermogravimetric analysis, infrared and electron spectroscopy and magnetic moment measurement, the composition, properties and the three-dimensional configuration of the two extractants and cobalt and nickel complexes were compared. The results show that the complexes formed by the two ligands are similar. Dark blue cobalt complex CoL_2 is a tetrahedral configuration. NiL 2, an anhydrous nickel complex of brown nickel, and NiL 2 · 2H 2 O, a green aqueous complex, are octahedral. The degree of covalent bonding of tetrahedral cobalt complexes is greater than octahedral nickel complexes.