in tetrahydrofuran; hexane (argon); addn. of Mo(CO)5(THF) in THF to the Fe complex in hexane, stirring (room temp., 3 h); removal of solvents (vac.), column chromy. (SiO2; hexane); elem. anal.;

in tetrahydrofuran; hexane (argon); stirring (room temp., 3 h); solvent removal (vac.), chromy. (SiO2; hexane); yield is for 2 steps; elem. anal.;