Reversible structural isomerisation in rare thioether complexes of cobalt(ii) - effects of ligand architecture

Rare examples of (high spin) Co(ii) complexes with geometrically constrained tetrathioether ligands exhibit a very unusual structural isomerism, switching reversibly between tetrahedral monomers in solution and octahedral chain polymers in the solid; the crystal structures of one polymeric species and a tetrahedral monomer model compound are described.