Aqua­chlorido(3,5-dinitro-2-oxidobenzo­ato-κ²O¹,O²)(1,10-phenanthroline-κ²N,N′)chromium(III)

In the title compound, [Cr(C₇H₂N₂O₇)Cl(C₁₂H₈N₂)(H₂O)], the Cr^III atom displays a distorted octa­hedral coordination geometry, with the chelating phenantroline and 3,5-dinitro­salicylate ligands in trans positions. In the crystal, mol­ecules are connected via O—H...O hydrogen bonds into a two-dimensional framework parallel to (100). In addition, there are π–π stacking inter­actions between phenanthroline ligands along the c axis, with a mean inter­planar distance of 3.456 (4) Å.

5,6-Dihydro-1,10-phenanthroline-1,10-diium μ-oxido-bis­[penta­fluoridotantalate(V)]

In the title compound, (C₁₂H₁₂N₂)[Ta₂F₁₀O], the doubly protonated 5,6-dihydro-1,10-phenantroline-1,10-diium cation is located on a twofold rotation axis, whereas the isolated [Ta₂OF₁₀]²⁻ dianion has -1 symmetry. In the so far unknown dianion, the symmetry-related Ta^V atoms are octa­hedrally coordinated by five F atoms and a bridging O atom, the latter being located on an inversion centre. The two pyridine rings in the cation make a dihedral angle of 22.8 (4)°. The cations and dianions are arranged in layers parallel to (100) and are connected through N—H...F and C—H...F hydrogen-bonding inter­actions into a three-dimensional structure.