Metal–nucleobase inter­action: bis[4-amino­pyrimidin-2(1H)-one-κN (3)]dibromidozinc(II)

In the title complex, [ZnBr(2)(C(4)H(5)N(3)O)(2)], the central metal ion is coordinated to two bromide ions and endocyclic N atoms of the two cytosine mol­ecules leading to a distorted tetra­hedral geometry. The structure is isotypic with [CdBr(2)(C(4)H(5)N(3)O)(2)] [Muthiah et al. (2001). Acta Cryst. E57, m558–m560]. There are two inter­ligand N—H⋯Br hydrogen bonds, generating two hydrogen-bonded rings stabilizing the coordination sphere. The complex aggregates, forming supra­molecular chains, sheets and staircases through N—H⋯O and N—H⋯Br hydrogen bonding and π–π stacking inter­actions [centroid–centroid distance = 3.616 (2) Å].