Heating;

in dichloromethane Slow addn. of solid W(C-t-Bu)Cl3(dme) to a stirred and cooled (-40°C) soln. of (TMS)TMT, soln. turns slowly red, then yellow, warming (room temp.), stirring overnight, yellow solid pptd.; Evapn. in vac., redissolving of yellow residue in min. amt. of CH2Cl2, storing (-40°C), elem. anal.;