Synthesis and X-ray crystal structures of bis(bis(μ2-2-aminoethanolato–N,O,O)–cobalt(III))–cobalt(II) hydrate, tris(biscyclohexylammonium)μ-hydroxo–bis(μ2-nitro–N,O)–hexanitro–dicobaltate(III) and biscyclohexylammonium nitrate(III)

Two new cobalt complexes: Co3(NO2)4(NH2CH2CH2O)4·H2O (1) and (NH2(C6H11)2)3[Co2(NO2)8OH]·3H2O (2) and the compound (NH2(C6H11)2)NO2 (3) were synthesised and their structures have been determined using single-crystal X-ray diffraction. Compound 1 consists of two centrosymmetrical trinuclear complexes and a water molecule of crystallization. Ligands coordinated to Co atoms are nitro and aminoethanolato groups. Structure 2 is built up of biscyclohexylammonium cations, dinuclear anions with hydroxo and nitro groups coordinated to Co atoms and water molecules. The coordination of Co atoms in both structures is roughly octahedral.