title: Poly[[tris-(μ-4,4'-bipyridine-κ(2)N:N')bis-(μ-l-lysinato-κ(3)N(1),O(1):O(1'))dizinc(II)] tetra-nitrate 0.6-hydrate dimethyl-formamide disolvate].
abstract: In the title compound, {[Zn(2)(C(6)H(14)N(2)O(2))(2)(C(10)H(8)N(2))(3)](NO(3))(4)·0.6H(2)O·2C(3)H(7)NO}(n), the Zn(II) ion is six-coordinated with a distorted octa-hedral geometry by two carboxyl-ate O atoms and one amino N atom from two l-lysinate (l-lys) ligands, and three N atoms from three 4,4'-bipyridine (4,4'-bipy) ligands. The Zn(II) ions are connected by the carboxyl-ate groups of the l-lys ligands in the a-axis direction and the bridging 4,4'-bipy ligands in the b- and c-axis directions, forming a three-dimensional cationic framework with channels along [100]. The nitrate anions and solvent water and dimethyl-formamide (DMF) mol-ecules are located in the channels and linked to the cationic framework by N-H⋯O and O-H⋯O hydrogen bonds. The occupancy of the water mol-ecule was fixed at 0.6. One of the DMF mol-ecules is disordered over two sets of sites, with an occupancy ratio of 0.632:0.368 (11).
authors.forename: Shu-Qiang
authors.initials: SQ
authors.lastname: Li
authors.forename: Ning-Hai
authors.initials: NH
authors.lastname: Hu