in neat (no solvent) thermal decompn. of PhBClNt-BuSiMe3 at 575°C and 0.005 Torr; products condensed at -196°C; reaction mixt. liquefies at ca. -60°C; removal of Me3SiCl at -45°C;

in pentane thermal decompn. of PhBClNt-Bu(SiMe3) at 575°C and 0.005 Torr; products dissolved in pentane at -78°C; soln. warmed up to room temp. and stirred for 12 h; solvent and Me3SiCl removed in vac.; residue recrystd. from toluene;