Acta Cryst. (2007). E63, m2566  [ doi:10.1107/S1600536807045667 ]

4-Dimethylaminopyridinium tetrakis[3,3,3-trifluoro-1-(2-thienylcarbonyl)prop-1-en-2-olato]europate(III)

X.-C. Wei, Y.-K. Bian, K.-B. Yu and D.-Y. He

Abstract: The title complex, (C₇H₁₁N₂)[Eu(C₈H₄F₃O₂S)₄] or [DMAP][Eu(TTA)₄], features a trivalent Eu^III cation that is eight-coordinated by eight O atoms derived from four chelating -diketonate ligands. The range of Eu-O bond distances is 2.3594 (18)-2.4896 (18) Å. The coordination polyhedron is based on a distorted tetragonal antiprism. N-HO hydrogen bonding connects the cation to the anion. There is twofold flip disorder of two thienyl rings with occupancies in the approximate ratio 2:1; one CF₃ group is equally disordered over two orientations, and another shows extensive disorder, modelled in four different orientations with unequal occupancies.

Online 21 September 2007

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