Bis{2-[(guanidinoimino)methyl]phenolato-κ3N,N′,O}cobalt(III) chloride hemihydrate

The title compound, [Co(C8H9N4O)2]Cl·0.5H2O, is a solvatomorph of the corresponding trihydrate. Unlike in the structure of the latter compound, there are two different cations in the asymmetric unit of the title compound. The ligand molecules are deprotonated at the phenol O atom and octahedrally coordinate the CoIII atoms through the azomethine N and phenolate O atoms in a mer configuration. In the crystal, the cations, chloride ions and lattice water molecules are linked by N—H...O, N—H...Cl, O—H...Cl and O—H...O interactions, forming a two-dimensional network parallel to (10-1).