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A previous analysis [Fatila et al. (2012). Dalton Trans. 41, 1352–1362] of the title complex, [Ce2(C5HF6O2)6(C4H10O2)3], had identified it as Ce(hfac)3(dme)1.5 according to the 1H NMR integration [hfac = 1,1,1,5,5,5‐hexafluoroacetylacetonate (1,1,1,5,5,5‐hexafluoro‐4‐oxopent‐2‐en‐2‐olate) and dme = 1,2‐dimethoxyethane]; however, it was not possible to determine the coordination environment unambiguously. The structural data presented here reveal that the complex is a binuclear species located on a crystallographic inversion center. Each CeIII ion is coordinated to three hfac ligands, one bidentate dme ligand and one monodentate (bridging) dme ligand, thus giving a coordination number of nine (CN = 9) to each CeIII ion. The atoms of the bridging dme ligand are unequally disordered over two sets of sites. In addition, in two of the –CF3 groups, the F atoms are rotationally disordered over two sets of sites. This is the first crystal structure of a binuclear lanthanide β‐diketonate with a bridging dme ligand.
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Document Type: Research Article

Publication date: April 15, 2012

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