Dioxygen Activation by Metalloenzymes and Models

Spin-driven activation of dioxygen in various metalloenzymes and their inspired models

Although potentially powerful, molecular oxygen is an inert oxidant due to the triplet nature of its ground state. Therefore, many enzymesse various metal cations (M) to produce singlet active species M(n) O(2) . In this communication we investigate the topology of the Electron Localization Function (ELF) within five biomimetic complexes which are representative of the strategies followed by me...

Reaction Mechanisms of Metalloenzymes and Synthetic Model Complexes Activating Dioxygen Reaction Mechanisms of Metalloenzymes and Synthetic Model Complexes Activating Dioxygen

Activation of Dioxygen by Halocarbon Ions

Tandem mass spectrometry is used to show that low energy collisions of ionized halocarbenes, including CBr2 and CBrCl•+, with molecular oxygen lead to (i) decarbonation with formation of the dihalogen molecular cation and (ii) oxygenolysis yielding BrCO+. Both reactions may occur via the same ion-molecule addition product of molecular oxygen and the ionized carbene. Reaction is favored at low c...

Preface to Volume 15 Sustaining Life on Planet Earth: Metalloenzymes Mastering Dioxygen and Other Chewy Gases

In this volume of the Metal Ions in Life Sciences series the mastering of dioxygen (O2), methane (CH4), and ammonia (NH3) by mainly manganese-, ironand copper-dependent metalloenzymes and their biomimetic complexes is discussed. It is closely related to Volume 14, The Metal-Driven Biogeochemistry of Gaseous Compounds in the Environment, which deals with the biogeochemistry of gases including di...

Dioxygen Activation by Enzymes Containing Binuclear Non-Heme Iron Clusters.