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

Abstract

The title cocrystal, [Cu(2)(C(2)O(4))(NO(3))(2)(C(7)H(9)N(3))(2)(H(2)O)(2)][Cu(2)(C(2)O(4))(NO(3))(2)(C(7)H(9)N(3))(2)(CH(4)O)(2)], is a 1:1 cocrystal of two centrosymmetric Cu(II) complexes with oxalate dianions and Schiff base ligands. In each mol-ecule, the Cu(II) centre is in a distorted octa-hedral cis-CuN(2)O(4) 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 mol-ecule, a monodentate nitrate anion and a water mol-ecule occupy the axial sites, and in the other, a monodentate nitrate anion and a methanol mol-ecule occupy these sites. In the crystal structure, inter-molecular N-H⋯O, O-H⋯O and N-H⋯N hydrogen bonds link the mol-ecules into a network. Weak intra-molecular N-H⋯O inter-actions are also observed.

Fig. 1.

The molecular structure of (I) (H atoms are omitted for clarity). Displacement ellipsoids are plotted at the 50% probability level. Symmetry codes: (i) -x, -y-1, -z-1; (ii) 2-x, -y, -z.

Fig. 2.

Part of the packing in (I) showing hydrogen bonds as broken lines.