REACTIONS OF -(N',N',N'',N''-TETRAMETHYL)GUANIDINYL-SUBSTITUTED PHOSPHINES WITH ORGANOELEMENT CHLORIDES INVOLVING PHOSPHORUS, SULFUR, AND SELENIUM - FORMATION OF STABLE PHOSPHINOPHOSPHONIUM, THIOPHOSPHONIUM, AND SELENOPHOSPHONIUM SALTS

By reaction of N-(N',N',N '',N ''-tetramethyl)guanidinyl-substituted p hosphines with diorganochlorophosphines, organodichlorophosphines, p-t olylsulfenylchloride and phenylselenylchloride a variety of stable pho sphonium chlorides with a P-E (E = P, S, Se) bond were obtained. In on e case, performing this reaction in the presence of sodium tetraphenyl borate led to the corresponding phosphonium tetraphenylborate. All com pounds were characterised by multinuclear NMR and elemental analysis. The selenophosphonium chloride 4a of the trihydrate was further charac terised by a single crystal X-ray analysis. The P-Se bond is very long [193.0(3), 193.3(3) pm in two independent formula units]. The water m olecules and the chloride anions form hydrogen bonded layers.