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

Abstract

The centrosymmetric binuclear complex cation of the title compound, [Cu2(C12H10N2O6)(C12H8N2)4](NO3)2·C12H12N2O6·8H2O, is composed of a CuII 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 π–π stacking and through lone-pair...π 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 π–π stacking interactions. 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 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.