potassium hydride in N,N-dimethyl-formamide Irradiation (UV/VIS); potassium hydride addn. to org. compd. soln. (Ar), stirring for 30 min,Fe-complex addn., mixt. irradiation (150 W tungsten lamp, 3 h), extn. with PE, crystn. on extract concn.; chromy. (basic alumina, PE as eluant);

t-BuOK; n-BuLi in tetrahydrofuran; hexane dropwise addn. of BuLi (2.5 M, hexane, 1 h) to soln. (THF) of Cp-deriv. (-78°C), mixing with soln. (THF) of Fe-intermediate (made from t-BuOK and Fe-compd., 0°C, 30 min), heating (60°C, 6 h); cooling to room temp. extn. (hexane-water (+ HCl drop)), org. phase drying (MgSO4), concg., chromy. (SiO2, hexane);

in not given byproducts: CO; Irradiation (UV/VIS); Ar-atmosphere; near-UV light, 298 K; not isolated, reaction followed by IR and (1)H-NMR spectroscopy;

in 2-methyl cyclohexane Irradiation (UV/VIS); Ar-atmosphere; near-UV light, 77 K; not isolated, reaction followed by IR spectroscopy;