water in tetrahydrofuran; hexane under N2 atm.; Teflon valved NMR tube was loaded with Fe complex; soln. of n-BuLi in hexane was added; THF added; NMR tube was shaken for several min; volatiles removed (vac.); solid dissolved in C6D6; DMF condensed into NMR tube; mixt. was shaken; H2O added; monitored by NMR spectroscopy;

in tetrahydrofuran; hexane under N2 atm.; soln. of n-BuLi in hexane was added to soln. of complex in THF at -78°C in H-type Schlenk tube; mixt. stirred for 30 min at -78°C; several drops of BuLi in hexane were added; volatiles evapd. (vac.); pentane distd. onto mixt.; mixt. was stripped with pentane by distg. pentane onto the mixt. and evapg. in vac.; mixt. washed (pentane); volatiles removed (vac.);