N-(7-Dibromo­methyl-5-methyl-1,8-naphthyridin-2-yl)acetamide–pyrrolidine-2,5-dione (1/1)

In the title co-crystal, C₁₂H₁₁Br₂N₃O·C₄H₅NO₂, the naphthyridine derivative and the pyrrolidine-2,5-dione mol­ecules have crystallographic mirror-plane symmetry with all non-H atoms, except the Br atom, located on the mirror plane. In the crystal, N—H...N, N—H...O and C—H...O hydrogen bonds link the mol­ecules into heterodimers. These dimers are further linked into a one-dimensional structure along [010] by weak C—Br...O inter­actions [Br...O = 3.028 (5) Å and C—Br...O = 158.52 (4)°].

(2,2′-Bi­pyridine-κ²N,N′)bis­(nitrato-κ²O,O′)copper(II)

In the title complex, [Cu(NO₃)₂(C₁₀H₈N₂)], the Cu^II cation is chelated by two nitrate anions and by one 2,2′-bi­pyridine ligand in a distorted N₂O₄ octa­hedral geometry. The dihedral angle between the pyridine rings is 1.92 (11)°. In the crystal, π–π stacking between parallel pyridine rings of adjacent complex mol­ecules is observed, the centroid–centroid distance being 3.6788 (19) Å. Weak C—H...O hydrogen bonds further link the mol­ecules into a three-dimensional supra­molecular architecture.

Ammonium 2-(3,4-di­methyl­benzo­yl)benzoate dihydrate

In the anion of the title compound, NH₄⁺·C₁₆H₁₃O₃⁻·2H₂O, the benzene rings are twisted with respect to each other by 73.56 (10)°. In the crystal, extensive N—H...O and O—H...O hydrogen bonds link the cations, anions and lattice water mol­ecules into a three dimensional supra­molecular structure.