Abstract
High-valent iron species are proposed as active intermediates in the cycles of many important biocatalysts. Iron(IV) is the most readily accessible high oxidation state, although iron(V) has also been proposed as a key intermediate in some non-heme dioxygenases. Structural and spectroscopic precedent for these intermediates has often come from studies of well-defined model complexes. For example, the iron(IV) oxo moiety, which has long been known to be at the catalytic centers of oxygenases, was first crystallographically characterized in an octahedral iron complex of an N-methylated 1,4,8,11-tetraazacyclotetradecane (cyclam) macrocycle .Similar cyclam derivatives have also allowed for the preparation and detailed spectroscopic characterization of octahedral Fe(V) and Fe(VI) nitrido complexes, but the structural characterization and reactivity of these fleeting intermediates, which are usually studied at low temperatures in frozen matrices, remains elusive.
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Acknowledgments
Text, schemes, and figures of this chapter, in part, are reprints of the materials published in [16]. The dissertation author was the secondary researcher and author. The co-authors listed in the publication also participated in the research. The permission to reproduce the paper was granted by the American Association for the Advancement of Science. Copyright 2011, American Association for the Advancement of Science.
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Vogel, C.S. (2012). PhB(tBuIm) ?3 : Synthesis, Structure, and Reactivity of an Iron(V) Nitride. In: High- and Low-Valent tris-N-Heterocyclic Carbene Iron Complexes. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27254-7_5
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