carbon monoxide in acetone soln. of (Cp2(CO)3Fe2(CHCH2))PF6 and NaI in acetone under 0.74 atm CO stirred at -78°C for 10 min and at ambient temp. for 1 h; evapd., dissolved in Et2O, chromd. (Al2O3, hexane, then hexane-ether);

carbon monoxide in acetone soln. of (Cp2(CO)3Fe2(CHCH2))PF6 and NaI in acetone under 0.74 atm CO stirred at -78°C for 10 min and at ambient temp. for 1 h; evapd., dissolved in Et2O, chromd. (Al2O3, hexane, then hexane-ether);

in acetonitrile (Cp2(CO)3Fe2(CHCH2))PF6 stirred in MeCN at 35° for 2 h; concd. in vac., extd. with hexane, passed through Al2O3 plug, rotary-evapd. at ambient temp., hexane-insol. fraction dried in high vac. for 2 h, recrystd. by dissolution in MeCN, filtration, and pptn. with Et2O;