Direct Kinetic Studies of Atom Transfer and Electron Transfer Reactions of Hydroperoxo and High-Valent Oxo Complexes of Chromium

A macrocyclic hydroperoxo chromium complex reacts with triphenyl phosphine in an acid-catalyzed oxygen-atom transfer reaction, k = 850 M-2 s-1. In a competing process, the hydroperoxo complex is converted to a dioxo chromium(V) species, which reacts with PPh3 by electron transfer, k = 4.4 × 105 M-1...

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Veröffentlicht in:	Journal of the American Chemical Society 2003-12, Vol.125 (48), p.14714-14715
Hauptverfasser:	Pestovsky, Oleg, Bakac, Andreja
Format:	Artikel
Sprache:	eng
Schlagworte:	Biomimetic Materials - chemistry Chemistry Chromium - chemistry Cytochrome P-450 Enzyme System - chemistry Cytochrome P-450 Enzyme System - metabolism Exact sciences and technology Inorganic chemistry and origins of life Kinetics Kinetics and mechanism of reactions Organometallic Compounds - chemistry Oxidation-Reduction
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Beschreibung
Zusammenfassung:	A macrocyclic hydroperoxo chromium complex reacts with triphenyl phosphine in an acid-catalyzed oxygen-atom transfer reaction, k = 850 M-2 s-1. In a competing process, the hydroperoxo complex is converted to a dioxo chromium(V) species, which reacts with PPh3 by electron transfer, k = 4.4 × 105 M-1 s-1.
ISSN:	0002-7863 1520-5126
DOI:	10.1021/ja0382213