The cocrystal μ-oxalato-κ4 O 1,O 2:O 1′,O 2′-bis(aqua(nitrato-κO){[1-(2-pyridyl-κN)ethylidene]hydrazine-κN}copper(II)) μ-oxalato-κ4 O 1,O 2:O 1′,O 2′-bis((methanol-κO)(nitrato-κO){[1-(2-pyridyl-κN)ethylidene]hydrazine-κN}copper(II)) (1/1)

Abstract

The title cocrystal, [Cu2(C2O4)(NO3)2(C7H9N3)2(H2O)2][Cu2(C2O4)(NO3)2(C7H9N3)2(CH4O)2], is a 1:1 cocrystal of two centrosymmetric CuII complexes with oxalate dianions and Schiff base ligands. In each molecule, the CuII centre is in a distorted octahedral cis-CuN2O4 environment, the donor atoms of the N,N′-bidentate Schiff base ligand and the bridging O,O′-bidentate oxalate group lying in the equatorial plane. In one molecule, a monodentate nitrate anion and a water molecule occupy the axial sites, and in the other, a monodentate nitrate anion and a methanol molecule occupy these sites. In the crystal structure, intermolecular N—H...O, O—H...O and N—H...N hydrogen bonds link the molecules into a network. Weak intramolecular N—H...O interactions are also observed.