Manoj Trivedi

catena-Poly[[(pyridine-κN)copper(II)]-μ3-pyridine-2,6-dicarboxylato-κ3O2:O2′,N,O6:O6′]

In the title compound, [Cu(C7H3NO4)(C5H5N)]n, the CuII atom is in a slightly distorted octahedral coordination environment. Each CuII atom is bound to two N atoms and one O atom of the pyridinedicarboxylate (PDA) ligand in a tridentate manner, one N atom of the pyridine molecule and two bridging carboxylate O atoms of adjacent PDA ligands, leading to a linear one-dimensional chain running along the c axis. These chains are further assembled via weak C—H⋯O and π–π interactions into a three-dimensional supramolecular network structure. The centroid–centroid distance between the π–π interacting pyridine rings is 3.9104u2005(13)u2005Å. The two N atoms are trans to each other with respect to Cu.

Dioxidobis(2-oxo-1,2-dihydropyridin-3-olato)­molybdenum(VI)

In the title compound, [Mo(C5H4NO2)2O2], the MoVI atom exhibits a distorted octahedral coordination geometry formed by two terminal oxo ligands and two monoanionic O,O-bidentate pyridinone ligands. The two terminal oxo ligands lie in a cis arrangement, the ketonic O atoms of the pyridinone ligands are coordinated trans to the oxo ligands and the deprotonated hydroxyl O atoms are located trans to each other. The crystal structure contains intermolecular N—H⋯O hydrogen bonds, C—H⋯O contacts and face-to-face π–π stacking interactions with an interplanar separation of 3.25u2005(1)u2005Å.