Inorganic Chemistry, Vol.39, No.16, 3605-3607, 2000
Stabilization of high-valent metals by corroles: Oxo[tris(pentafluorophenyl)corrolato]chromium(V)
The aerobic reaction of Cr(CO)(6) with tris(pentafluorophenyl)corrole (H-3(TpFPC)) in toluene gives the dark red oxochromium(V) compound (TpFPC)Cr(O), which has been characterized by X-ray crystallography, electrochemistry, and EPR spectroscopy. Short Cr-N (1.927-1.943 Angstrom) bonds as well as relatively large N-14 and small Cr-53 coupling constants suggest that sigma(N --> Cr) donation is responsible for the unusual stability of chromium(V) in this complex. The Cr-V/IV reduction potential (0.11 V vs Ag/AgCl) is 0.65 V below that of oxo(tetra-mesitylporphinato)chromium(V).