期刊
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
卷 47, 期 4, 页码 280-295出版社
PLEIADES PUBLISHING INC
DOI: 10.1134/S1070328421040059
关键词
β -diketonates; lanthanides; F-19 NMR spectroscopy; mass spectrometry
资金
- Russian Science Foundation [19-73-00242]
- Russian Science Foundation [19-73-00242] Funding Source: Russian Science Foundation
The functionalized lithium CF3-beta-diketonate reacts with trivalent rare-earth metal salts in methanol to form homobinuclear and heterobi(tri)nuclear complexes, depending on the nature of the transition metal and anion. These complexes were characterized by X-ray structure analysis and mass spectrometry, revealing a range of different structures. The isomeric forms of the diketonate in a solution of deuterated dimethyl sulfoxide were studied using F-19 NMR spectroscopy.
The reactions of functionalized lithium CF3-beta-diketonate (LiL) with trivalent rare-earth metal salts in methanol afford homobinuclear and heterobi(tri)nuclear complexes depending on the nature of the transition metal and anion (chlorides, nitrates, and acetates). In the cases of lanthanum(III) and cerium(III), homoleptic complexes [(LnL(3))(2)] are isolated (CIF files CCDC nos. 2031097 (Ia) and 2031102 (Ib)). The reaction of LiL with praseodymium(III) nitrate gives the new trimetallic structure [(LiPrL3)(LiL)(NO3)(H2O)(2)] (CIF file CCDC no. 2031103 (II)), and the replacement of nitrate by chloride gives [(PrL3)(LiL)(H2O)] (CIF file CCDC no. 2031104 (IIIa)). Regardless of the nature of the anion of the salt in the series from neodymium(III) to ytterbium(III) and yttrium(III), Ln-Li beta-diketonates [(LnL(3))(LiL)(solv)] (solv is H2O and MeOH) are formed, and their structures are characterized by X-ray structure analysis (CIF files CCDC nos. 2031099 (IIIb), 2031100 (IIIc), 2031098 (IVa), 2031096 (IVc), 2031094 (IVf), 2031101 (IVg), and 2031095 (IVh)). The equilibrium of the diketonate isomeric forms in a solution of deuterated dimethyl sulfoxide is studied by F-19 NMR spectroscopy, and the qualitative composition of the polynuclear complexes is determined by mass spectrometry.
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