Crystal structure and Hirshfeld surface analysis of (μ-2-{4-[(carboxylatomethyl)carbamoyl]benzamido}acetato-κ2O:O′)bis[bis(1,10-phenanthroline-κ2N,N′)copper(II)] dinitrate N,N′-(1,4-phenylenedicarbonyl)diglycine monosolvate octahydrate

The centrosymmetric binuclear complex cation of the title compound, [Cu-2(C12H10N2O6)(C12H8N2)(4)](NO3)(2)center dot C12H12N2O6 center dot 8H(2)O, is composed of a Cu-II atom with a distorted trigonal-bipyramidal coordination environment defined by four N atoms from two bidentate 1,10-phenanthroline ligands and one oxygen atom from one-half of the monodentate N,N'-(1,4-phenylenedicarbonyl) diglycinate anion. The asymmetric unit is completed by one-half of the N,N'-(1,4-phenylenedicarbonyl) diglycine solvent molecule, which is located on a centre of inversion, by one nitrate counter-anion and four water molecules. In the crystal, the cationic complexes are linked via intermolecular pi-pi stacking and through lone-pair center dot center dot center dot pi interactions involving the N,N'-(1,4-phenylenedicarbonyl) diglycinate anion and the phenanthroline ligands. The N,N'-( 1,4-phenylenedicarbonyl) diglycine solvent molecule is involved in classical and non-classical hydrogen-bonding interactions, as well as pi-pi stacking interactions. The centroid-to-centroid distances between aromatic entities are in the range 3.5402 (5)-4.3673 (4) angstrom. The crystal structure is stabilized by further C-H center dot center dot center dot O contacts as well as by O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds between water molecules, the nitrate anions, the N,N'-(1,4-phenylenedicarbonyl) diglycinate ligands, N,N'-(1,4-phenylenedicarbonyl) diglycine solvent molecules and phenanthroline ligands, giving rise to a supramolecular framework. A Hirshfeld surface analysis was carried out to quantify these interactions.