carbon monoxide in acetone Fe-complex and NaI were stirred in acetone under a CO (0.65 atm) atmosphere for 10 min at -78°C and then 90 min at room temp.; evapd. in vacuo, Et2O was added, mixt. was filtered, filtrate evapd., residue was subjected to flash chromy. (Al2O3, Et2O-hexane); CpFe(CO)2I was identified by (1)H NMR and IR; high-resolution MS data for the alkenyl complex;

in hexadeuterioacetone thermal decomposition above -20°C; flash chromy. (alumina, CH2Cl2-hexane); high-resolution mass spectral data for (Cp(CO)Fe)2(μ-CO)(μ-C=CHCOOEt);

in hexadeuterioacetone thermal decomposition above -20°C; flash chromy. (alumina, CH2Cl2-hexane); high-resolution mass spectral data for (Cp(CO)Fe)2(μ-CO)(μ-C=CHCOOEt);