The Coordination Structure of the Extracted Nickel(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10

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• 作者：Zhu Shan ; Hu Hui-ping ; Li Ji-yuan and Hu Fang
• 刊名：Journal of the Chinese Chemical Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：64
• 期：2
• 页码：205-216
• 全文大小：724K
• ISSN：2192-6549

文摘

In the present work, the nickel(II) synergist complex with isobutyric acid (HL^I ) and 5-hydroxy-4-octanone oxime (HB^I ), which were the corresponding short-chain analogs of the active synergistic mixture of Versatic10 (HL) and Lix63 (5,8-diethyl-7-hydroxy-6-dodecanoneoxime, HB), was prepared and studied by single-crystal X-ray diffraction (XRD). The crystal structure of the nickel(II) synergist complex showed that the composition of the complex was Ni(L^I )₂(HB^I )₂ with a cis-form octahedron geometry structure. Both intra- and intermolecular hydrogen bonding were observed in the crystal lattice. Compared with the free ligands, similar band shifts of Fourier transform infrared (FT-IR) spectra assigned to the stretching vibration of carbon–oxygen single bond (CO), the stretching vibration of carbon–nitrogen double bond (CN), and the disappearance of the scissoring vibration of α-hydroxy (OH) were correspondingly found in both the nickel(II) synergist complex and the extracted nickel(II) complex in the nonpolar organic phase. Combined with the results from ESI-MS, XRD, and slope analysis, it was concluded that the major species of the extracted nickel(II) complex in the nonpolar organic phase might possess a similar coordination structure [Ni(HB)₂(L)₂] as the nickel(II) synergist complex, along with the neutral complex [Ni(HB)(B)₂].