in neat (no solvent) room temp., molar ratio borazine/HN(SiMe3)2 3:1,16-18 h;

in anhydrous xylene 48 h; RefluxInert atmosphere;

in xylene byproducts: Me3SiCl; under N2 or Ar; soln. of B compd. in xylene heated at reflux for 2 d; Me3SiCl and solvent removed in vac.; solid sujected to sublimation (95°C, 2 Torr); elem. anal.;

in dichloromethane byproducts: Me3SnCl; exclusion of moisture, N2 atmosphere, refluxing for 15 h; sepn. of CH2Cl2 by distn., sublimation of Me3SnCl, recrystn. (CH2Cl2), elem. anal.;