Acta Cryst. (2009). E65, m198-m199  [ doi:10.1107/S1600536809001421 ]

Bis{6,6'-dimethoxy-2,2'-[ethane-1,2-diylbis(iminomethylene)]diphenolato(1.5-)-⁴O,N,N',O'}erbium(III)

H.-T. Xia, D.-F. Rong, Y.-Y. Zhang, S.-P. Yang and D.-Q. Wang

Abstract: In the title compound, [Er(C₁₈H_22.5N₂O₄)₂], the Er atom is located on a twofold rotation axis and is eight-coordinated by four O atoms and four N atoms from two symmetry-related 6,6'-dimethoxy-2,2'-(ethane-1,2-diyldiiminodimethylene)diphenolate(1.5-) ligands. Due to disorder of one phenolate H atom with half-occupation, the overall charge of one tetradentate ligand is -1.5. The ligand molecules are stabilised by intramolecular N-HO and O-HO hydrogen bonds and are linked into a chain parallel to the a axis by a C-HO hydrogen bond. Neighbouring chains are connected by van der Waals forces, resulting in a three-dimensional network.

Online 17 January 2009

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