Abstract
Addition of imidazole (1-methylimidazole) to the p-nitrophenolatoiron(III) complex of protoporphyrin-IX-dimethylester showed very interesting features dependent on the nature of solvent and the ratio of the ligand to heme. The complexes formed under various conditions were iron(III) complexes with a phenolate anion and an imidazole, iron(III) complexes with two imidazoles, and a reduced (iron(II)) complex with two imidazoles. Absorption, magnetic circular dichroism, and 1H NMR spectroscopies were employed to identify the complexes. The reduced complexes were formed only in the presence of l-MeIm and in nonpolar solvents (toluene and benzene). This indicates that the oxidation-reduction potential of Fe(III) low-spin complex is higher than that of Fe(III) high-spin-complex and that the potential is higher in nonpolar solvent than that in polar solvent.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.