The condensation of ylidyl chlorophosphines with phosphines and bis(diphenylphosphino)methane and -amine

Ylidyl chlorophosphanes 1 and dichlorophosphanes 2 react with trimethylsily l phosphanes to yield the ylidyl diphosphanes 3, 4, 5, 7 and the 2-ylidyl t riphosphanes 8. From the reaction of compounds 1 with lithium diphosphanyl amide and diphosphanyl methanide result the ylidyl diphosphonium ylides 11 and ylidyl diphosphinimines 13. The former rearrange to give the ylidyl tri phosphanyl methanes 12. The chloromethyl diphosphinimine 13c enters a cycli zation to give the 1,2,3,5 -azatriphosphole derivative 14, the structure of which has been solved by X-ray analysis. From the reaction of ylidyl bis(c hlorophosphanes) 17 and 20 with the same reagents the 1,7,3,5-tetraphosphin ine derivative 18 and the 1,2,3,5,6-azatetraphosphinine derivatives 19 and 21 are obtained.