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Title: Reactivity of methane mono-oxygenase, insights from quantum mechanic studies on synthetic iron model complexes
Authors: Knops-Gerrits, PP ×
Jacobs, Pierre
Fukuoka, A
Ichikawa, M
Faglioni, F
Goddard, WA #
Issue Date: 2001
Publisher: ELSEVIER SCIENCE BV
Series Title: Journal of molecular catalysis. A: Chemical vol:166 issue:1 pages:3-13
Conference: date:CALTECH, Beckman Inst 139 74, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USA; Katholieke Univ Leuven, Ctr Catalysis & Surface Sci, B-3001 Heverlee, Belgium; Hokkaido Univ, Ctr Catalysis Res, Sapporo, Hokkaido 060, Japan; Univ Catholique Louvain, Dept Chim, B-1348 Louvain, Belgium
Abstract: Methane mono-oxygenase (MMO) and deoxyhemerythrin (DHr) are examples of di-iron enzymes that catalyze the dissociative and non-dissociative binding of molecular oxygen. To mimic the MMO active site with a finite cluster, we chose to study the binuclear heptapodate coordinated iron(III)-complexes of N,N,N,N'-tetrakis(2-benzimidazolylmethyl)-2-hydroxy-1,3-diamino-propane (HPTB) and N,N,N',N'-tetrakis(2-pyridylmethyl)-2-hydroxy-1,3-diamino-propane (HPTP). These have active sites of the form [Fez (HPTP)(mu -OH)](4+) (1) and [Fe-2(HPTB)(mu -OH)](4+) (2). Quantum mechanics structures are compared with the experimental data obtained from the EXAFS analysis. For the O-2 binding on the reduced active site. the mu-eta (1):eta (1)-O-2 mode seems the slightly more stable precursor to the O=Fe-O-Fe=O bis-ferryl (re)active site. The nature of the ferryl groups are these of a reactive two center three electron bond. (C) 2001 Elsevier Science B.V. All rights reserved.
ISSN: 1381-1169
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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