n-butyllithium in tetrahydrofuran to soln. Fe complex in THF n-BuLi was added at -78°C followed by addn. Mn complex, stirred at 0°C for 4 h; solvent was removed in vacuo, residue was extd. with hexane, concd. and cromd. on silica (hexane), soln. was concd. and cooled to -40°C for several days, purification by sublimation; elem. anal.;