1,3,2,4-Dithiadiphosphetane 2,4-disulfides

1,3,2,4-Dithiadiphosphetane 2,4-disulfides are a class of organophosphorus, four-membered ring compounds which contain a P₂S₂ ring. Many of these compounds are able to act as sources of the dithiophosphine ylides; the most well known example is Lawesson's reagent.

Other examples of this class of compound have been made; many inorganic chemists are now using Fc₂P₂S₄ (Fc = ferrocene) as a starting material in reactions investigating the general chemistry of the 1,3,2,4-dithiadiphosphetane 2,4-disulfides, one reaction for this is that the Fc₂P₂S₄ compound and all its derivatives are red which make column chromatography of the products more easy. Also the ferrocenyl groups provide an electrochemical handle which provide another means of investigating the properties of the products.