Structures and Magnetism of Two Novel Heptanuclear Lanthanide-Centered Trigonal Prismatic Clusters:  [LnCu6(μ3-OH)3(HL)2(L)4](ClO4)2·25H2O (Ln = La, Tb; H2L = Iminodiacetic Acid)

The new heteronuclear iminodiacetic acid (H2L) complexes [LnCu6(μ3-OH)3(HL)2(L)4](ClO4)2·25H2O with Ln = La (1) and Tb (2) have been prepared in aqueous solution and characterized by single-crystal X-ray diffraction to be isomorphous (crystallographic data for 1 and 2:  hexagonal, P63/m; a = b = 12....

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Published in:Inorganic chemistry 2000-06, Vol.39 (12), p.2488-2492
Main Authors: Liu, Qin-De, Gao, Song, Li, Jun-Ran, Zhou, Qing-Zhong, Yu, Kai-Bei, Ma, Bao-Qing, Zhang, Shi-Wei, Zhang, Xi-Xiang, Jin, Tian-Zhu
Format: Article
Language:English
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Summary:The new heteronuclear iminodiacetic acid (H2L) complexes [LnCu6(μ3-OH)3(HL)2(L)4](ClO4)2·25H2O with Ln = La (1) and Tb (2) have been prepared in aqueous solution and characterized by single-crystal X-ray diffraction to be isomorphous (crystallographic data for 1 and 2:  hexagonal, P63/m; a = b = 12.6425(14) Å, c = 24.541(5) Å, Z = 2 (1); a = b = 12.5802(9) Å, c = 24.285(4) Å, Z = 2 (2)). Ln3+ was found to be located in the center of the trigonal prismatic cage formed by six Cu2+ ions, with a tricapped trigonal prismatic coordination environment of nine O atoms. The magnetic properties of complexes 1 and 2 have been studied. The results indicate the presence of ferromagnetic couplings between Tb3+ and Cu2+ in compound 2.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic990860k