Preparation, UV-Vis, IR and 1H NMR spectra, and molecular structure of the complex ion (η~2-carbonato)(α,α,α,α-tetrakis (o-pivalamidophenyl)porphinato)ferrate(III)

摘要

An iron(lIl) porphyrin complex containing a bidentate carbonato axial ligand has been synthesized for the first time and fully characterized by UV-Vis, IR and 1H NMR spectroscopies and X-ray crystallography. Proton NMR data for the isolated species is in accordance with high-spin (S = 5/2) ferric derivative. The crystal structure of the (cryptand-222 )potassium(+) (dihaptocarbonato)(α,α,α,α-terakis(opivalamidophenyl)(porphinato)ferrate(III) chlorobenzene has been determined. This structure confirms the highspinstate of the carbonato derivative and shows that the coordination sphere of the iron atom is strongly affected by the asymmetric bidentate (η~2) mode of the carbonato axial ligand.