Electron paramagnetic resonance study of nitrosylprotoheme dimethyl ester complexes with aliphatic nitrogenous bases: characterization of the axial ligand trans to the nitrosyl group in nitrosylhemoproteins
Authors:
T Yoshimura
Affiliation:
The Environmental Science Institute of Hyogo Prefecture, Yukihira-cho, Suma-ku, Kobe 654, Japan
Abstract:
The interaction of nitrosyl(protoporphyrin IX dimethyl ester) iron (II) (Fe(PPDME)(NO)) with aliphatic amines, anilines, and cyclic imines has been studied by electron paramagnetic resonance (EPR) measurements at room temperature and at 77K. At room temperature, the bases studied here were divided into two groups according to the exchange rate between two EPR-positive species, Fe(PPDME)(NO) and Fe(PPDME)(NO)B, in equilibrium; Fe(PPDME)(NO) + B
