Bis{2-[(guanidinoimino)methyl]-phenolato-kappa N-3,N ',O}cobalt(III) chloride hemihydrate

The title compound, [Co(C8H9N4O)(2)]Cl center dot 0.5H(2)O, 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 Co III 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 center dot center dot center dot O, N-H center dot center dot center dot Cl, O-H center dot center dot center dot Cl and O-H center dot center dot center dot O interactions, forming a two-dimensional network parallel to (101).