Bis[μ-4-(1H-imidazol-3-ium-1-yl)benzoato-κ2O:O′]bis[(methanol)tris(nitrato-κ2O,O′)terbium(III)]

Abstract

In the centrosymmetric dinuclear title complex, [Tb2(NO3)6(C10H8N2O2)2(CH3OH)2], the Tb atoms are bridged by the carboxylate groups of the two 4-(1H-imidazol-3-ium-1-yl)benzoate (iba) ligands. The iba ligand adopts a zwitterionic form with a protonated imidazole group. The Tb atom adopts a distorted tricapped trigonal–prismatic coordination geometry and is coordinated by six O atoms of three chelating nitrate ions, one O atom of the methanol molecule and two O atoms of two iba ligands. The intramolecular Tb...Tb separation is 5.1419 (3) Å. O—H...O and N—H...O hydrogen bonds connect complex molecules into a two-dimensional network.