Activation of C–H Bond in 1,1′-Ferrocene Derived Schiff Base by Cobalt(I) Complex Supported by Trimethylphosphine. X-ray Crystal Structure of η2[N,C]-(1-N-naphthyl ferrocenylideneamine) tris(trimethylphosphine) cobalt(I)

Abstract

The title compound, η 2[N,C]-(1-N-naphthylferrocenylideneamine) tris(trimethylphosphine) cobalt(I) was synthesized by reactions of N-naphthyl ferrocenylideneamine with CoMeL4 (L = PMe3), which has been characterized by IR, 1H and 31P NMR spectra, and the crystal structure has been determined by means of X-ray diffraction. To our knowledge this is the first example of C–H activation in ferrocenylideneamine by an electron-rich cobalt complex. The cobalt complex crystallized in the monoclinic space group P2(1)/c, a = 10.692(2) A, b = 14.273(3) A, c = 19.719(4) A, β = 99.58(3)°. The cobalt atom is penta-coordinate in a trigonal bipyramidal geometry, with two phosphorus atoms and the imino group occupying the equatorial positions, and another phosphorus atom and the carbon atom of the naphthyl group taking the axial position.