Moessbauer, NMR, Geometric, and Electronic Properties in S = 3/2 Iron Porphyrins

摘要

Iron porphyrins with the intermediate spin 5 =3/2 or admixed with S = 5/2 or 1/2 are models for a number of heme protein systems, including cytochromes c'. They have been intensely investigated experimentally. In particular, the ~(57)Fe Mossbauer quadrupole splittings and ~1H and ~(13)C NMR chemical shifts have been found to be useful probes of their electronic states. However, specific relationships between these spectroscopic properties and geometric parameters have not been reported.