catena-Poly[[(1,10-phenanthroline)cobalt(II)]-di-μ-azido]

In the crystal structure of the binuclear title complex, [Co(N₃)₂(C₁₂H₈N₂)]_n, each Co^II cation is coordinated by two N atoms from one chelating 1,10-phenanthroline ligand and four azide ligands in a slightly distorted octa­hedral coordination. The two Co^II cations of the binuclear complex are related by an inversion centre and are bridged by two symmetry-related azide ligands in both μ_1,1 and μ_1,3 modes. The μ_1,3 bridging mode gives rise to an infinite one-dimensional chain along the a axis, whereas the μ_1,1 bridging mode is responsible for the formation of the binuclear Co^II complex.

Tetra-μ-benzoato-bis­[(3,5-dimethyl­pyridine)­copper(II)]

In the centrosymmetric binuclear title compound, [Cu₂(C₇H₅O₂)₄(C₇H₉N)₂], the Cu^II atom is coordinated by four O atoms from benzoate anions and one N atom from a dimethyl­pyridine ligand. A paddle-wheel-like dimer is formed by two Cu^II ions and four benzoate anions with two 3,5-dimethyl­pyridine ligands at the axial position of the Cu^II ions. The dihedral angle between the two unique benzene rings is 84.26 (16)°. The dihedral angles between the pyridine ring and the benzene rings are 61.67 (15) and 34.27 (14)°. There is π–π stacking of inversion-related pyridine rings, with a centroid–centroid distance of 3.833 (2) Å.