Poly[(μ2-nitrato-κ2 O:O′)(μ2-pyrimidin­ium-2-carboxyl­ato-κ2 O:O′)lithium(I)]

In the structure of the title compound, [Li(C5H4N2O2)(NO3)]n, the LiI ion is coordinated by two carboxyl­ate O atoms donated by two ligands and two nitrate O atoms in a distorted tetrahedral geometry. LiI ions, bridged by carboxyl­ate O atoms, form mol­ecular ribbons composed of dimeric units. Two nitrate O atoms link the ribbons into mol­ecular layers parallel to (001). Hydrogen bonds are active between protonated heterocyclic N atoms as donors and carboxyl­ate O atoms as acceptors. The layers are held together by van der Waals inter­actions

(Nitrato-κ2 O,O′)bis­(tryptanthrin-κN)silver(I)

In the crystal structure of the title compound, [Ag(NO3)(C15H8N2O2)2], tryptanthrin (indolo[2,1-b]quinazoline-6,12-dione) and silver nitrate form a 2:1 complex. The silver ion is surrounded by two tryptanthrin ligands, each coordinating through the N atoms, with Ag—N bond lengths of 2.247 (3) and 2.264 (3) Å, and an anionic nitrate ligand coordinating through two O atoms, with Ag—O bond lengths of 2.499 (3) and 2.591 (3) Å. The N—Ag—N plane and the O—Ag—O plane are roughly perpendicular, making a dihedral angle of 81.6 (2)°. In the crystal, C—H⋯O inter­actions between aromatic H atoms and keto and nitrate O atoms as well as π–π inter­actions [centroid-centroid distance = 3.706 (4) Å] give rise to a three-dimensional network

Poly[hemi(ethyl­enediammonium) [di-μ-oxalato-indium(III)] dihydrate]

In title compound, {(C2H10N2)0.5[In(C2O4)2]·2H2O}n, the unique InIII ion is coordinated by eight O atoms from four oxalate ligands in a distorted square-anti­prismatic environment. The doubly bis-chelating oxalate ligands act as bridging ligands connecting symmetry-related InIII ions and forming a three-dimensional open framework structure. Ethyl­enediammonium cations and water mol­ecules occupy the voids within the structure. The unique ethyl­enediammonium cation and one water mol­ecule both lie on a twofold rotation axis. One of the other two water mol­ecules residing on general crystallographic sites was refined as disordered with half occupancy. In the crystal structure, cations and water mol­ecules are linked to the anionic framework via inter­molecular O—H⋯O and N—H⋯O hydrogen bonds