RARE-EARTH TRISHEXAFLUOROACETYLACETONATES AND RELATED COMPOUNDS

被引:248
作者
RICHARDSON, MF
WAGNER, WF
SANDS, DE
机构
[1] Department of Chemistry, University of Kentucky, Lexington
来源
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY | 1968年 / 30卷 / 05期
关键词
D O I
10.1016/0022-1902(68)80557-3
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Rare-earth trishexafluoroacetylacetonates, Ln(hfac)3·nH2O, have been prepared and characterized by chemical analyses, infra-red spectra, and X-ray powder diffraction patterns. Two series of hydrates exist: Ln(hfac)3·3H2O (Ln = LaNd) and Ln(hfac)3·2H2O (Ln = LaLu). No evidence for a lower hydrate was found. A mixed ligand chelate, Ln(hfac)2CF3CO2·2H2O, is a byproduct of the tris chelate preparations. Several series of salts were also prepared, including NH4Ln (hfac)4·nH2O (n = 0 and 1 for Ln = LaNd; n = 0 for Ln = SmLu), pyHLn(hfac)4·nH2O (n = 0 and 1 for Ln = LnNd; n = 0 for Ln = SmLu), and (pyH)2Ln(hfac)5 (Ln = LaNd). Ln(hfac)3·3H2O. NH4Ln(hfac)4·H2O, and pyHLn(hfac)4·H2O are reversibly converted with great ease to Ln(hfac)3·2H2O, NH4Ln(hfac)4, and pyHLn(hfac)4, respectively. Most of the chelates studied are probably eight-co-ordinate, including Ln(hfac)3·3H2O, NH4Ln(hfac)4·H2O, and pyHLn(hfac)4·H2O, but (pyH)2Ln(hfac)5 may be ten-co-ordinate. © 1968.
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页码:1275 / +
页数:1
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