in diethyl ether addn. of Ag(CF3CO2) at -78°C to a soln. of Li(C6F5) in diethyl ether, stirred for 60 min under N2, addn. of (PPh3CH3)(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, evapn., addn. of n-hexane, pptn.; elem. anal.;

in diethyl ether addn. of Ag(CF3CO2) at -78°C to a soln. of Li(C6F5) in diethyl ether, stirred for 60 min under N2, addn. of (PPh3CH3)(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, evapn., addn. of n-hexane, pptn.; elem. anal.;