Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 8 (August 2008)

metal-organic compounds

gd3217 scheme

Acta Cryst. (2008). C64, m292-m295 [ doi:10.1107/S0108270108019975 ]

Tetrakis(-anthracene-9-carboxylato)-⁴O:O';³O,O':O';³O:O,O'-bis[(anthracene-9-carboxylato-²O,O')(1,10-phenanthroline-²N,N')erbium(III)]: effects of a noncoordinating anthracene ligand ring system on the final structure of a coordination complex

C.-S. Liu, L.-Q. Guo, L.-F. Yan and J.-J. Wang

Abstract: The title complex, [Er₂(C₁₅H₉O₂)₆(C₁₂H₈N₂)₂], has a centrosymmetric binuclear cage structure in which the two Er^III atoms are both nine-coordinated and are bridged by four bulky anthracene-9-carboxylate (L) ligands, with a nonbonding ErEr separation of 3.9041 (2) Å. The L groups coordinate each Er^III atom in three different ways. The results reported here reveal that the bulky anthracene skeleton of the L ligand plays an important role in the formation of the complex by virtue of intra- and intermolecular [pi] - [pi] stacking and C-H [pi] interactions.

Formula: [Er₂(C₁₅H₉O₂)₆(C₁₂H₈N₂)₂]