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Computational Mechanistic Insights on the NO Oxidation Reaction Catalyzed by Non-Heme Biomimetic Cr-N-Tetramethylated Cyclam Complexes

Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, Italy
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Int. J. Mol. Sci. 2019, 20(16), 3955; https://doi.org/10.3390/ijms20163955
Received: 28 June 2019 / Revised: 31 July 2019 / Accepted: 8 August 2019 / Published: 14 August 2019
(This article belongs to the Special Issue Computational Studies of Reaction Mechanisms)
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Abstract

The conversion reaction of NO to NO3 ion catalyzed by the end-on [Cr(III)(n-TMC)(O2)(Cl)]+ superoxo and side-on [Cr(IV)(n-TMC)(O2)(Cl)]+ peroxo non-heme complexes (n = 12, 13, 14 and 15), which are biomimetic systems of nitric oxide dioxygenases (NODs), has been explored using a computational protocol in the framework of density functional theory. Results show that the potential energy profiles for the studied reactions lie above the reagent energies, regardless of the used catalyst. Both the O-O bond breaking in the biomimetics and the NO3 ion formation require low energy barriers suggesting an efficient catalytic power of the studied systems. The rate-determining step depends on ligand size. View Full-Text
Keywords: biomimetic chromium catalysts; DFT; potential energy surface; NO catalytic conversion biomimetic chromium catalysts; DFT; potential energy surface; NO catalytic conversion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Marino, T.; Fortino, M.G.; Russo, N.; Toscano, M.; Alberto, M.E. Computational Mechanistic Insights on the NO Oxidation Reaction Catalyzed by Non-Heme Biomimetic Cr-N-Tetramethylated Cyclam Complexes. Int. J. Mol. Sci. 2019, 20, 3955.

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