The crystal structure of o-4-diphenylphosphino-2-phenyl-1,3,2-dioxabor
inane 1 indicates the occurrence of an interaction between the pi-syst
ems of the 1,3,2-dioxaborinane ring and the appropriate phenyl group o
f the diphenylphosphino group. Complexes of compound 1 with PtCl2, PdC
l2, and Cul were synthesized. Compound 1 and its complexes are readily
hydrolyzed in solution to give diphenylphosphine and its correspondin
g complexes (NMR).