Spectroelectrochemistry of the dioxygen adduct of an iron(II) C2-capped porphyrin

James H. Cameron, Steven C. Turner

Research output: Contribution to journalArticle

Abstract

The spectrolectrochemistry of the dioxygen adduct of the iron(II) C2-capped porphyrin complex [FeIIL(B)] {H2L = 5,10,15,20-tetraphenylporphyrin capped at the o-position of each of the phenyl rings by C6H2[C(O)O(CH2)2O] 4-1,2,4,5, B = 1-methylimidazole or pyridine} has been studied in both dimethyl sulfoxide and pyridine solutions. In both cases electrooxidation of the adduct produced an unusual spectrum, assigned to a new type of O2 adduct, [FeIIIL(B)(O2)]+. Subsequent electroreduction of the system regenerated the original O2 adduct, but not in 100% yield, indicating that some dissociation of O2 had occurred during the redox cycling. This behaviour is discussed in terms of bonding in the Fe-O2 adducts.

Original languageEnglish
Pages (from-to)1941-1945
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number13
DOIs
Publication statusPublished - 1993

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