in diethyl ether addn. of Ag(CF3CO2) to a soln. of Li(C6F5) in diethyl ether at -78°C, stirred for 60 min under N2, addn. of (As(C6H5)3CH3)(CF3CO2), stirred for 10 min, warmed to room temp.; pptn. filtered off, washed with water, dissolved in diethyl ether, filtered through a layer of anhydrous MgSO4, evapd., addn. of n-hexane, pptn.; elem. anal.;

in diethyl ether addn. of Ag(CF3CO2) to a soln. of Li(C6F5) in diethyl ether at -78°C, stirred for 60 min, warmed to 0°C, addn. of three drops of water, stirred for 15 min, addn. of (AsPh3Me)(CF3CO2), warmed to room temp., stirred for 45 min; evapd. to dryness, residue washed with water, extn. (diethyl ether), filtered through a layer of anhydrous MgSO4, evapn., addn. of n-hexane; elem. anal.;

in diethyl ether addn. of Ag(CF3CO2) to a soln. of Li(C6F5) in diethyl ether at -78°C, stirred for 60 min under N2, addn. of (As(C6H5)3CH3)(CF3CO2), stirred for 10 min, warmed to room temp.; pptn. filtered off, washed with water, dissolved in diethyl ether, filtered through a layer of anhydrous MgSO4, evapd., addn. of n-hexane, pptn.; elem. anal.;