Axial ligand substituted nonheme FeIV=O complexes: Observation of near-UV LMCT bands and Fe=O Raman vibrations

Chivukula V. Sastri, Mi Joo Park, Takehiro Ohta, Timothy A. Jackson, Audria Stubna, Mi Sook Seo, Jimin Lee, Jinheung Kim, Teizo Kitagawa, Eckard Münck, Lawrence Que, Wonwoo Nam

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138 Scopus citations

Abstract

Axial ligand substitution of a mononuclear nonheme oxoiron(IV) complex, [FeIV(O)(TMC)(NCCH3)]2+ (1) (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), leads to the formation of new FeIV=O species with relatively intense electronic absorption features in the near-UV region. The presence of these near-UV features allowed us to make the first observation of Fe=O vibrations of S = 1 mononuclear nonheme oxoiron(IV) complexes by resonance Raman spectroscopy. We have also demonstrated that the reactivity of nonheme oxoiron(IV) intermediates is markedly influenced by the axial ligands.

Original languageEnglish
Pages (from-to)12494-12495
Number of pages2
JournalJournal of the American Chemical Society
Volume127
Issue number36
DOIs
StatePublished - 14 Sep 2005

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