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The centrosymmetric binuclear complex cation of the title compound, [Cu 2 (C 12 H 10 N 2 O 6 )(C 12 H 8 N 2 ) 4 ](NO 3 ) 2 ·C 12 H 12 N 2 O 6 ·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-phenyl-enedicarbon-yl)diglycinate anion. The asymmetric unit is completed by one-half of the N , N '-(1,4-phenyl-enedicarbon-yl)diglycine solvent mol-ecule, which is located on a centre of inversion, by one nitrate counter-anion and four water mol-ecules. In the crystal, the cationic complexes are linked via inter-molecular π-π stacking and through lone-pair⋯π inter-actions involving the N , N '-(1,4-phenyl-enedicarbon-yl)diglycinate anion and the phenanthroline ligands. The N , N '-(1,4-phenyl-enedicarbon-yl)diglycine solvent mol-ecule is involved in classical and non-classical hydrogen-bonding inter-actions, as well as π-π stacking inter-actions. The centroid-to-centroid distances between aromatic entities are in the range 3.5402 (5)-4.3673 (4) Å. The crystal structure is stabilized by further C-H⋯O contacts as well as by O-H⋯O and N-H⋯O hydrogen bonds between water mol-ecules, the nitrate anions, the N , N '-(1,4-phenyl-enedicarbon-yl)diglycinate ligands, N , N '-(1,4-phenyl-enedicarbon-yl)diglycine solvent mol-ecules and phenanthroline ligands, giving rise to a supra-molecular framework. A Hirshfeld surface analysis was carried out to qu-antify these inter-actions.

acta crystallographica. section e, crystallographic communications

Crystal structure and Hirshfeld surface analysis of (μ-2-{4-[(carboxylatomethyl)carbamoyl]benzamido}acetato-κ2 O:O′)bis[bis(1,10-phenanthroline-κ2 N,N′)copper(II)] dinitrate N,N′-(1,4-phenylenedicarbonyl)diglycine monosolvate octahydrate