in 1,2,5-trimethyl-benzene byproducts: H2; heating in mesitylene at 130-150°C under exclusion of air and moistur, further products: Ph2PH, Ph2P(O)PPh2; evapn. of mesitylene and Ph2PH in vacuum, sublimation of a product-mixture, product Ph2POBC8H14-HBC8H14 elem. anal.;

in 1,2,5-trimethyl-benzene byproducts: H2; heating in mesitylene at 130-150°C under exclusion of air and moistur, further products: Ph2PH, Ph2P(O)PPh2; evapn. of mesitylene and Ph2PH in vacuum, sublimation of a product-mixture, product Ph2POBC8H14-HBC8H14 elem. anal.;