Perhaps thats the problem youre reading a borane article the one I am referring to is Attwood Bott el Al  InorgChem p which describes the synthesis of the gallane TMEDA adduct by a reaction of the gallane  trimethylamine adduct in EtO basically add TMEDA solution to gallane adduct solution slowly wait a while get rid of ether recrystallise jobs a goodun as we say in the old country Did some similar myself once with low valent indiumgallium compounds but never got a paper out of it sadly my gunk never recrystallised