“…[2] increases with the number of amino groups attached to the phosphorus atom and decreases with increasing bulk of the As far as aminophosphanes are concerned, the analogy between hydrazines and mono-aminophosphanes can be re-P-and N-substituents. The first compound of type RЈP(NHR) 2 such as C 5 F 5 P(NHR) 2 (R ϭ tBu, CH 2 Ph) was adily expanded because a P III atom allows for the formation of the series of compounds RHNϪPR 2 , (RHN) 2 PR and reported in 1966. [7] Another series of compounds PhP(NHR) 2 (R ϭ Me, Et, nPr, iPr, tBu) was described in (RHN) 3 P and all these should be amenable to depro-1967.…”