Bis(2,2'-bipyridyl-κN,N')bis-(2-hydroxy-benzoato)-κO;κO,O-cadmium(II) methanol solvate

Abstract

The title compound, [Cd(C(7)H(5)O(3))(2)(C(10)H(8)N(2))(2)]·CH(3)OH, contains one monomeric seven-coordinate cadmium complex and one methanol solvate mol-ecule. The Cd(II) atom is coordinated to two 2,2'-bipyridyl ligands via the N atoms and to two salicylate anions (Hsal(-)) via the carboxyl-ate 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 octa-hedron with the apical positions occupied by one of the two N atoms belonging to one bipyridyl ligand and one of the two carboxyl-ate O atoms from the monodentate Hsal(-) ligand. Two intra-molecular six-membered hydrogen-bonded rings are present, generated from inter-actions between the carboxyl-ate and hydr-oxy groups of the salicylate ligands. There is one inter-molecular hydrogen-bonding inter-action involving the methanol solvent mol-ecule and the carboxyl-ate group from the monodentate Hsal(-) ligand. The crystal packing is governed by π-π stacking inter-actions [centroid-centroid distance = 3.783 (4) Å] which occur between bipyridyl ligands, by C-H⋯O and C-H⋯π inter-actions and by numerous van der Waals contacts.

Fig. 1.

Molecular view of the solvate methanol complex showing atomic numbering and O—H–O hydrogen bonds in dotted lines. Displacements ellipsoïds are drawn at the 30% probability level.