Titanocenedicarbonyl, Cp2Ti(CO)2, activates the sulfur-sulfur bond in organic disulfides and sulfur homocycles like S6, S7 and S8.Cyclic disulfides form chelating ligands with sulfur atoms attached to the Ti atom.The reaction with S6 yields a new compound with an eight sulfur atoms containing ligand.The novel titanocene compounds have been used as precursors for the synthesis of a series of methylene polysulfides.