title: (Propane-1,3-diammonium) bis-(4-hydroxy-pyridine-2,6-dicarboxyl-ato-κO,N,O)zinc(II) 3.5-hydrate.
abstract: The asymmetric unit of the title compound, (C(3)H(12)N(2))[Zn(C(7)H(3)NO(5))(2)]·3.5H(2)O, contains two formula units. The compound consists of an anionic complex, a doubly protonated propane-1,3-diamine as a counter-ion and 3.5 uncoord-inated water mol-ecules. The coordination polyhedron around the Zn(II )atom is distorted octa-hedral, defined by four O atoms and two N atoms from two Hchel (H(3)chel = 4-hydroxy-pyridine-2,6-dicarboxylic acid) ligands. In the crystal structure, O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds along with π-π stacking inter-actions [centroid-centroid distance = 3.473 (2) Å] are observed to reinforce the crystal cohesion.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ghadermazi
authors.forename: Faranak
authors.initials: F
authors.lastname: Manteghi
authors.forename: Hossein
authors.initials: H
authors.lastname: Aghabozorg