Bis(2,2′-bipyridyl-κ2N,N′)bis(2-hydroxybenzoato)-κO1;κ2O1,O1′-cadmium(II) methanol solvate

The title compound, [Cd(C7H5O3)(2)(C10H8N2)(2)]center dot CH3OH, contains one monomeric seven-coordinate cadmium complex and one methanol solvate molecule. The Cd-II atom is coordinated to two 2,2'-bipyridyl ligands via the N atoms and to two salicylate anions (Hsal(-)) via the carboxylate O atoms, which act as monodentate ligand for the one and bidentate ligand for the second. The Cd-II atom exhibits a {6 + 1} environment, approximately described as a distorted capped octahedron with the apical positions occupied by one of the two N atoms belonging to one bipyridyl ligand and one of the two carboxylate O atoms from the monodentate Hsal(-) ligand. Two intramolecular six-membered hydrogen-bonded rings are present, generated from interactions between the carboxylate and hydroxy groups of the salicylate ligands. There is one intermolecular hydrogen-bonding interaction involving the methanol solvent molecule and the carboxylate group from the monodentate Hsal(-) ligand. The crystal packing is governed by pi-pi stacking interactions [centroid-centroid distance = 3.783 (4) angstrom] which occur between bipyridyl ligands, by C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions and by numerous van der Waals contacts.