Low-spin iron(III) chiroporphyrins: 1H NMR studies of cyanide and substitute imidazole coordination

Research was conducted on low-spin complexes of iron(III) chiroporphyrin, obtained from (1R)-cis-caronaldehyde acid methyl ester and pyrrole as the atropisomer, with R-imidazoles and cyanide using 1D and 2D 1H nuclear magnetic resonance spectroscopy. Results reveal that low-spin iron(III) chiroporphyrin complexes exhibit significantly different properties in relation to analogous low-spin iron(III) tetrarylporphyrins.