Tris(ethyl-enediamine)-cobalt(III) diformatodioxalatoindate(III) dihydrate

Bis[hexa-amminecobalt(III)] penta-chloride nitrate

The title compound, [Co(NH₃)₆]₂Cl₅(NO₃), was obtained under hydro­thermal conditions. The asymmetric unit contains three Co³⁺ ions, one lying on an inversion center and the other two located at 2/m positions. All Co³⁺ ions are six-coordinated by NH₃ mol­ecules, forming [Co(NH₃)₆]³⁺ octahedra, with Co—N distances in the range 1.945 (4)–1.967 (3) Å. The nitrate N atom and one of the O atoms lie at a mirror plane. Among the Cl⁻ anions, one lies in a general position, one on a twofold axis and two on a mirror plane. N—H⋯O and N—H⋯Cl hydrogen bonds link the cations and anions into a three-dimensional network.

Tris(ethyl-enediamine-κN,N')cobalt(III) aqua-tris-(oxalato-κO,O)indate(III)

In the cation of the title compound, [Co(C(2)H(8)N(2))(3)][In(C(2)O(4))(3)(H(2)O)], the Co(III) atom is coordinated by six N atoms from three ethyl-enediamine mol-ecules. The Co(III)-N bond lengths lie in the range 1.956 (4)-1.986 (4) Å. In the anion, the In(III) atom is seven-coordinated by six O atoms from three oxalate ligands and by a water mol-ecule. The cations and anions are linked by extensive O-H⋯O and N-H⋯O hydrogen bonds, forming a supermolecular network.

Tris(2,2'-bi-1H-imidazole-κN,N)cobalt(II) hydrogen phosphate

The title compound, [Co(C(6)H(6)N(4))(3)]HPO(4), was synthesized under hydro-thermal conditions. In the cation, the Co(II) atom is octa-hedrally coordinated by six N atoms from three 2,2'-bi-1H-imidazole ligands [Co-N bond lengths are in the range 2.084 (5)-2.133 (6) Å]. Inter-molecular N-H⋯O hydrogen bonds form an extensive hydrogen-bonding network, which links cations and anions into a three-dimensional crystal structure.

Bis(diethyl-enetriamine)-cobalt(III) hexa-chloridoindate(III)

The title compound, [Co(C(4)H(13)N(3))(2)][InCl(6)], was synthesized under hydro-thermal conditions. In the cation, the Co-N bond lengths lie in the range 1.967 (2)-1.9684 (15) Å. In the anion, the In(III) atom is coordinated by six Cl atoms resulting in a slightly distorted octa-hedral geometry. Both metal atoms are located on special positions of site symmetry 2/m. Furthermore, one Cl atom and one N atom are located on a mirror plane. N-H⋯Cl hydrogen bonds between cations and anions consolidate the crystal packing.