Easily oxidised nucleophiles, such as iodide, bromide, and 1,8-bis(dimethylamino)naphthalene, react with the diaquotetraphenylporphyrinatoiron(III) cation radical complex, [Fe(H2O)2(tpp˙)]2+, to give the corresponding tetraphenylporphyrin complex, [Fe(H2O)2(tpp)]+, while pyridine gives an entirely different product, [(tpp)FeOFe(tpp˙)]+; e.s.r. spectra and potentiometric evidence suggest that a base-dependent
易氧化的亲核试剂,例如
碘化物,
溴化物和1,8-双(二甲基
氨基)
萘,与二苯基四氮杂
卟啉铁(III)阳离子自由基络合物[Fe(H 2 O)2(tpp˙)] 2+反应,得到相应的
四苯基卟啉配合物,[Fe(H 2 O)2(tpp)] +,而
吡啶则提供了完全不同的产物,[(tpp)FeOFe(tpp˙)] +;esr光谱和电势证据表明,后者反应中发生了碱依赖性内部电子异构化,导致
四苯基卟啉-氧代
铁(IV)。