Reactions of Becker-type phosphaalkenes 5a-e with triorganotin hydride
s 1a,b proceed through 1,2-addition to furnish the stannylphosphanes 7
a-j. Analogous use of the diorganotin dihydrides II and 14 gives rise
to the hydridostannylphosphanes 12 and 15. The product 16 of a double
addition can also be isolated from the reaction of dimethyltin dihydri
de 14 with the phosphaalkene 5a.