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Nonheme iron(II) complexes of macrocyclic ligands in the generation of oxoiron(IV) complexes and the catalytic epoxidation of olefins

Title
Nonheme iron(II) complexes of macrocyclic ligands in the generation of oxoiron(IV) complexes and the catalytic epoxidation of olefins
Authors
Suh Y.Seo M.S.Kim K.M.Kim Y.S.Jang H.G.Tosha T.Kitagawa T.Kim J.Nam W.
Ewha Authors
남원우김연상김관묵김진흥서미숙
SCOPUS Author ID
남원우scopus; 김관묵scopus; 김진흥scopus
Issue Date
2006
Journal Title
Journal of Inorganic Biochemistry
ISSN
0162-0134JCR Link
Citation
vol. 100, no. 4, pp. 627 - 633
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Mononuclear nonheme oxoiron(IV) complexes bearing 15-membered macrocyclic ligands were generated from the reactions of their corresponding iron(II) complexes and iodosylbenzene (PhIO) in CH3CN. The oxoiron(IV) species were characterized with various spectroscopic techniques such as UV-vis spectrophotometer, electron paramagnetic resonance, electrospray ionization mass spectrometer, and resonance Raman spectroscopy. The oxoiron(IV) complexes were inactive in olefin epoxidation. In contrast, when iron(II) or oxoiron(IV) complexes were combined with PhIO in the presence of olefins, high yields of epoxide products were obtained. These results indicate that in addition to the oxoiron(IV) species, there must be at least one more active oxidant (e.g., FeIV-OIPh adduct or oxoiron(V) species) that effects the olefin epoxidation. We have also demonstrated that the ligand environment of iron catalysts is an important factor in controlling the catalytic activity as well as the product selectivity in the epoxidation of olefins by PhIO. © 2006 Elsevier Inc. All rights reserved.
DOI
10.1016/j.jinorgbio.2005.12.013
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자연과학대학 > 화학·나노과학전공 > Journal papers
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