Download citation
Download citation

link to html
In the title compound, {(NH4)[Ag(C5HN2O6)2(H2O)]}n, the AgI cation is seven-coordinated and is surrounded by four oxo O atoms of the 2,3,5,6-tetra­oxo-4-nitro­pyridin-4-ide species [Ag—O = 2.3848 (19), 2.4931 (18), 2.5361 (18) and 2.573 (2) Å], two nitro O atoms [Ag—O = 2.644 (2) and 2.661 (2) Å], and one water mol­ecule [Ag—O = 2.3133 (19) Å]. The pyridin-4-ide mono-anions act as polydentate bridging ligands and form a three-dimensional network that is stabilized through O—H...O and N—H...O hydrogen bonds involving the coordinating water mol­ecule and the imide function as donator groups. The ammonium cations are located in the cavities of the framework and are also involved in hydrogen bonding to O atoms of the ligand.

Download citation
Download citation

link to html
In the title compound, [Ba(C7H5N2O5)2(H2O)6]·4H2O, the Ba2+ cation lies on a twofold rotation axis and is ten-coordinated by two 3,5-bis­(hy­droxy­imino)-1-methyl-2,4,6-trioxo­cyclo­hexa­n­ide oxo O atoms [Ba—O = 2.8715 (17) Å], two hy­droxy­imino N atoms [Ba—N = 3.036 (2) Å], and six water mol­ecules [Ba—O = 2.847 (2), 2.848 (2), and 2.880 (2) Å]. The 3,5-bis­(hy­droxy­imino)-1-methyl-2,4,6-trioxo­cyclo­hexa­nide monoanions act in a bidentate chelating manner, coordinating through an N atom of the non-deprotonated hy­droxy­imino group and an O atom of the neighboring oxo group. Two lattice water mol­ecules are located in the cavities of the framework and are involved in hydrogen bonding to O atoms of one of the coordinating water mol­ecules and the O atom of a keto group of the ligand. As a result, a three-dimensional network is formed.
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds