triethylamine in diethyl ether byproducts: {N(C2H5)3H}Cl; cooling a solution of 3.0 g phenylboric acid in 1 l diethyl ether in presence of 5.5 g triethyl amine at -78°C, addition of a solution of 11.3 g disiloxane in 50 ml diethyl ether drop by drop, warming to room temp. and stirring overnight;; filtration; removal of solvent; recrystallization from CH2Cl2-hexanes at -6°C;;

N(C2H5)3 in diethyl ether byproducts: {N(C2H5)3H}Cl; to a cooled (-78 °C) soln. of (C6H5)B(OH)2 and excess triethylamine in Et2O was added dropwise a soln. of 1,3-dichlorotetraphenyldisiloxane in the same solvent, warmed to room temp., mixture was allowed to stir overnight;; filtration, evapn. of solvent; product mixture obtained (by (29)Si NMR); purification on recrystn. of the residue from CH2Cl2/hexane at -6 °C; elem. anal.;;

in benzene byproducts: water; refluxing (equimolar mixture, 4 h, continuous removal of water); cooling, filtration, distn. (reduced pressure), recrystn. (Et2O:petroleum ether 1:3); elem. anal.;

in benzene byproducts: H2O; molar ratio of PhB(OH)2:Ph2Si(OH)2=1:2, reflux; water was removed as azeotrope, removal of excess C6H6, elem. anal.;