large number of trifluoromethyl groups: tetrakis[3,5-bis(trifluoromethyl)phenyl]borate; tetrakis [3,5-bis(1-methoxy-2,2,2-trifluoro-1-(trifluoromethyl)ethyl) phenyl] borate; tetrakis[3-(1- methoxy-2,2,2-trifluoro-1-(trifluoromethyl)ethyl)-5-(trifluoromethyl)phenyl] borate; and tetrakis[3-(2,2,2- trifluoro-1-(2,2,2-trifluoroethyoxy)-1-(trifluoromethyl)ethyl)-5- (trifluoromethyl)phenyl]borate ions. The preparation