triethylamine in diethyl ether byproducts: 1,2-dimethoxyethane; Cooling of TMTH and NEt3 soln. (-30°C), addn. of Mo(C-t-Bu)Cl3(dme) as solid in small portions, soln. turns yellow, then green as Et3NHClpptd., warming to room temp.; Filtn. through Celite after 2 h, evapn. to dryness in vac., recrystn. from min. amt. of ether (-40°C).;