1H NMR Study of the Reaction of Iron(III) Porphyrins with NaBH4in the Presence of Alkenes. Formation of Organoiron(III) Porphyrins

Abstract The treatment of [(tpp)FeIIICl] [tpp = tetraphenylporphyrin dianion] with NaBH4 in the presence of alkenes afforded σ-type organoiron(III) porphyrins, the structure of which was analyzed by paramagnetic 1H NMR. While 1-alkenes were hydrometallated to give σ-(1-methylalkyl)FeIII(tpp) along with a small amount of σ-(alkyl)FeIII(tpp), 2- and 3-alkenes yielded σ-(1-methylalkyl)FeIII(tpp) complexes without any regioisomers.