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The title compound, [Cu(NO 3 )(C 12 H 8 N 2 ) 2 ]NO 3 ·C 7 H 6 O 5 ·H 2 O, consists of a mononuclear complex cation with the central Cu II atom in a distorted trigonal-bipyramidal coordination sphere. Two N atoms of two 1,10-phenanthroline ligands occupy the axial sites, and the remaining N atoms of the two ligands, as well as one nitrate O atom the equatorial positions. One mol-ecule each of gallic acid and water are present in the crystal as solvent mol-ecules that do not coordinate to the Cu II cation, just as the nitrate counter-anion. In the crystal, inter-molecular O-H⋯O hydrogen bonds, as well as C-H⋯O inter-actions and π-π ring stacking between benzene and pyridine rings [centroid-to-centroid distances = 3.471 (2), 3.559 (2) and 3.790 (2) Å], link the mol-ecules into a three-dimensional network structure.

acta crystallographica. section e, crystallographic communications

Crystal structure of (nitrato-κO)bis(1,10′-phenanthroline-κ2N,N′)copper(II) nitrate gallic acid monosolvate monohydrate