Bis(1,10-phenanthroline-5,6-dione-κ²N,N′)silver(I) 2-hy­droxy-3,5-dinitro­benzoate

In the cation of the title salt, [Ag(C₁₂H₆N₂O₂)₂](C₇H₃N₂O₇), the Ag^I atom is coordinated in a distorted tetra­hedral geometry by four N atoms from two 1,10-phenanthroline-5,6-dione ligands, while the 3,5-dinitro­salicylate anion has only a short contact [2.847 (6) Å] between one of its O atoms and the Ag^I atom. The dihedral angle between the two 1,10-phenanthroline-5,6-dione ligands is 58.4 (1)°. There is an intra­molecular O—H...O hydrogen bond in the 3,5-dinitro­salicylate anion.

2,4,5-Tris(pyridin-4-yl)-1H-imidazole monohydrate

In the crystal structure of the title compound, C₁₈H₁₃N₅·H₂O, adjacent mol­ecules are linked by O—H...N and N—H...O hydrogen bonds, generating a chain propagating along [001].

Poly[[tri-μ₃-hydroxido-tris­(μ₄-pyridine-2,5-dicarboxyl­ato)trineodymium(III)] monohydrate]

In the title compound, {[Nd₃(C₇H₃NO₄)₃(OH)₃]·H₂O}_n, the Nd^III atom is eight-coordinated by the three O atoms of three asymmetrically μ₃-bridging hydroxide groups, by four carboxyl­ate O atoms of four different pyridine-2,5-dicarboxyl­ate (2,5-pydc) ligands, and by the N atom of a 2,5-pydc ligand. Six Nd atoms are connected by six hydroxide groups, forming an [Nd₆(μ₃-OH)₆] cluster unit of symmetry -3 and a slightly compressed octa­hedral geometry. Adjacent [Nd₆(μ₃-OH)₆] clusters are connected by the 2,5-pydc ligands, via O and N atoms, forming chains along the c axis. The remaining O atoms of the 2,5-pydc ligands link these chains into a three-dimensional framework. A disordered water molecule, located on a threefold rotation axis at the opposite side of the [Nd₆(μ₃-OH)₆] cluster and exposed to each of the three Nd atoms, completes the structure.