in tetrahydrofuran FeCl2(1.5 equiv.) and PMe3(3 equiv.) refluxed in THF for 1 h under inert atm., cooled to -78°C, K(1+)-2,4.Me2pd(1-)(2.0 equiv.) in THF added over 30 min, stirred for 15 min at -78°C and for 2 h at room temp.; filtered through Celite, evapd., extd. with pentane, crystd. at -30°C: yield of crude product 48percent; elem. anal.;