Al2O3 in diethyl ether; pentane Ar-atmosphere; pentane/ether=1:1, 36°C, 2 days; decompg. of Fe3(CO)12 by addn. of acid alumina, filtration, solvent removal, dissoln. in hexane, chromy. (Florisil, hexane contg. 5 vol.percent ether), recrystn. (pentane), sublimation; elem. anal.;

Al2O3 in benzene Ar-atmosphere; 60°C, 36 h; decompg. of Fe3(CO)12 by addn. of acid alumina, filtration, solvent removal, dissoln. in hexane, chromy. (Florisil, hexane); elem. anal.;