Possible dimers of hypochlorous acid (HOCl) arising from hydrogen- and halogen-bond interactions

► The Cl atom of HOCl molecule can act as a hydrogen-bond or halogen-bond acceptor, or as a halogen-bond donor. ► The HOCl molecule can dimerize to form six different complexes but not at room temperature. ► The characters of intermolecular interactions in these complexes are quite different.