Bis(mu-3-nitrobenzene-1,2-dicarboxylato)-kappa8O1,O2:O2,O3;O3,O2:O2,O1-bis[triaqua(2-carboxy-3-nitrobenzoato-kappa2O,O')lanthanum(III)] dihydrate

Li Qin Xiong; Chuan Min Qi

doi:10.1107/S0108270106047822

Bis(mu-3-nitrobenzene-1,2-dicarboxylato)-kappa8O1,O2:O2,O3;O3,O2:O2,O1-bis[triaqua(2-carboxy-3-nitrobenzoato-kappa2O,O')lanthanum(III)] dihydrate

Acta Crystallogr C. 2007 Jan;63(Pt 1):m10-2. doi: 10.1107/S0108270106047822. Epub 2006 Dec 12.

Authors

Li Qin Xiong¹, Chuan Min Qi

Affiliation

¹ College of Chemistry, Beijing Normal University, 100875 Beijing, People's Republic of China.

PMID: 17206034
DOI: 10.1107/S0108270106047822

Abstract

The title compound, [La2(C8H3NO6)2(C8H4NO6)2(H2O)6].2H2O, consists of dimeric units related by an inversion center. The two La(III) atoms are linked by two bridging bidentate carboxylate groups and two monodentate carboxylate groups. Each La(III) atom is nine-coordinated by six O atoms from five different carboxylate groups and three from water molecules. Hydrogen bonds between the water molecules and between the solvent water and a carboxylate O atom are observed in the structure. In the crystal packing, there are slipped pi-pi stacking interactions between the parallel benzene rings. Both hydrogen-bonding and pi-pi interactions combine to stabilize the three-dimensional supramolecular network.