byproducts: PH(C6H5)2; reaction in presence of 2-ethyl-1-hexanol under exclusion of air and moisture; dissolving of the residue in CHCl3, addn. of pentane gives Ph2P(H)OB(OP(BH3)Ph2)3, elem. anal.;

in toluene heating at 120°C for 30 min under exclusion of air and moisture; monitored by NMR;

in toluene heating at 120°C for 30 min under exclusion of air and moisture; monitored by NMR;

byproducts: BH(C2H5)2, B(C2H5)3, diphenylphosphorane-borane; heating to 120°C for 2 h under exclusion of air and moisture;

Multi-step reaction with 2 steps