in toluene byproducts: ((i-Pr)(CH(SiMe3)2)2Si)2Si2D2HOMe; (Ar); addn. of MeOD by vac. transfer to toluene soln. of 1,1,4,4-tetrakis(bis(trimethylsilyl)methyl)-1,4-diisoproyl-2-(9-borabicyclo(3.3.1)nonan-9-yl)tetrasila-2-ene, stirring from -78°C to room temp. over 2 h; evapn. of solvent and MeOH, monitoring by NMR;

in toluene byproducts: ((i-Pr)(CH(SiMe3)2)2Si)2Si2H3OMe; (Ar); addn. of MeOH by vac. transfer to toluene soln. of 1,1,4,4-tetrakis(bis(trimethylsilyl)methyl)-1,4-diisoproyl-2-(9-borabicyclo(3.3.1)nonan-9-yl)tetrasila-2-ene, stirring from -78°C to room temp. over 2 h; evapn. of solvent and MeOH, monitoring by NMR;