Preparation and structural studies of a number of heterocyclic phosphoranes

Abstract A series of monocyclic five-membered ring containing trivalent phosphorus compounds with oxygen, nitrogen and sulfur bonded to phosphorus, in various combinations has been allowed to react with trifluoroethyl and 1,1,1,3,3,3-hexafluoroisopropyl benzenesulfenates. In some cases, pentacoordinated phosphorus compounds resulted. These materials have been studied by various NMR techniques. The same trivalent phosphorus compounds were allowed to react with 3,4-(bistrifluoromethyl)1,2,dithiete. In some cases phosphoranes were formed and they were also studied by NMR.