Bis(μ-2-hydroxybenozato)-κ3O,O′:O′;-κ3O:O,O′-bis[(2-hydroxybenozato-κ2O,O′)(1,10-phenanthroline-κ2N,N′)-cadmium(II)]

The dinuclear title compound, [Cd-2(C7H5O3)(4)(C12H8N2)(2)], is located on a crystallographic rotation twofold axis. The two CdII ions are connected by two tridentate bridging 2-hydroxybenzoate anions. Each Cd-II ion is seven- coordinated by five O atoms from three 2-hydroxybenzoate ligands and two N atoms from 1,10-phenanthroline. The 2-hydroxybenzoate molecules adopt two kinds of coordination mode, bidentate chelating and tridentate bridging-chelating. Intramolecular hydrogen bonds between hydroxy and carboxylate groups from 2-hydroxybenzoate groups and pi-pi stacking interactions between parallel 1,10-phenanthroline ligands [centroid-centroid distances = 3.707 (3) and 3.842 (3) angstrom] are observed. Furthermore, adjacent benzene rings from 2-hydroxybenzoate ligands are involved in pi-pi interactions with interplanar distances of 3.642 (3) angstrom, thereby forming a chain along the a axis direction.