n-butyllithium in hexane

in tetrahydrofuran (N2) soln. Li(1-SiMe3-Ind) in THF was added dropwise at room temp. to soln. Ni complex in THF, stirred for 10 min; solvent was removed in vacuo, residue was extd. with hexane, concd. and cooled to -78°C; elem. anal.;