Acta Cryst. (2008). E64, m15-m16  [ doi:10.1107/S1600536807062241 ]

Tetrakis(-anthracene-9-carboxylato)bis[(anthracene-9-carboxylato)(2,2'-bipyridyl)lanthanum(III)]

C.-S. Liu, L.-F. Yan, Z. Chang and J.-J. Wang

Abstract: The title complex, [La₂(C₁₅H₉O₂)₆(C₁₀H₈N₂)₂], has a centrosymmetric binuclear cage structure in which two La^III atoms are both nine-coordinated and bridged by four anthracene-9-carboxylate ligands, with an LaLa separation of 4.0880 (4) Å. The remaining coordination sites are occupied by two N atoms of a 2,2'-bipyridine (bipy) and two O atoms of an anthracene-9-carboxylate ligand. The six anthracene-9-carboxylate groups coordinate each La^III atom in three different ways. Adjacent discrete dinuclear units are arranged into a one-dimensional chain along the [111] direction by intermolecular - stacking interactions, with a centroid-centroid separation of 3.704 (7) Å.

Online 6 December 2007

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