Mechanistic Study of Oxygen-Transfer Reaction Catalyzed by an Oxorhenium(V) Compound

2001 ◽  
Vol 40 (5) ◽  
pp. 994-999 ◽  
Author(s):  
Ruili Huang ◽  
James H. Espenson
Keyword(s):  
Oxygen Transfer ◽  
Transfer Reaction ◽  
Mechanistic Study

Photoreaktionen 2-sulfinylsubstituierter Benzaldehydeeine neue photoinduzierte Sauerstoff-Transfer-Reaktion / Photoreactions of 2-Sulfinyl Substituted Benzaldehydes aNew Photoinduced Oxygen-Transfer Reaction

1976 ◽  
Vol 31 (12) ◽  
pp. 1658-1661 ◽  
Author(s):  
Reinhard Lüdersdorf ◽  
Klaus Praefcke
Keyword(s):  
Oxygen Atom ◽  
Oxygen Transfer ◽  
Redox Reaction ◽  
Transfer Reaction ◽  
Ortho Position ◽  
Benzoic Acids ◽  
Photochemical Conversion ◽  
New Type ◽  
Substituted Benzaldehydes ◽  
Sulfinyl Group

The photochemical conversion of 2-sulfinyl substituted benzaldehydes into benzoic acids in a new type of redox reaction is discribed in which a transfer of an oxygen atom, originally attached to sulphur, takes place by insertion into the C-Η bond of the aldehyde function located in ortho position. Influences of substituents at the sulfinyl group in this photoreaction which seems to be limitated to aldehydes are discussed briefly.

Mechanistic study of a manganese porphyrin catalyst for on-demand production of chlorine dioxide in water

2015 ◽  
Vol 19 (01-03) ◽  
pp. 492-499 ◽  
Author(s):  
Scott D. Hicks ◽  
Silei Xiong ◽  
Curt J. Bougher ◽  
Grigori A. Medvedev ◽  
James Caruthers ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Chlorine Dioxide ◽  
Transfer Reaction ◽  
Water Soluble ◽  
Reaction Pathways ◽  
Mechanistic Study ◽  
Manganese Porphyrin ◽  
Oxygen Atom Transfer ◽  
On Demand ◽  
Proton Coupled Electron Transfer

A water-soluble manganese porphyrin complex was examined for the catalytic formation of chlorine dioxide from chlorite under ambient temperature at pH 5.00 and 6.90. Quantitative kinetic modeling allowed for the deduction of a mechanism that accounts for all experimental observations. Catalysis is initiated via an OAT (Oxygen Atom Transfer) reaction resulting in formation of a putative manganese(V) oxo species, which undergoes ET (Electron Transfer) with chlorite to form chlorine dioxide. As chlorine dioxide accumulates in solution, chlorite consumption slows down and ClO 2 reaches a maximum as the system reaches equilibrium. In phosphate buffer at pH 6.90, manganese(IV) oxo accumulates and its reaction with ClO 2 gives ClO 3-. However, at pH 5.00 acetate buffer proton coupled electron transfer (PCET) from chlorite to manganese(IV) oxo is fast and irreversible leading to chlorate formation only via the putative manganese(V) oxo species. These differences underscore how PCET rates affect reaction pathways and mechanism. The ClO 2 product can be collected from the aqueous reaction mixture via purging with an inert gas, allowing for the preparation of chlorine dioxide on-demand.

scholarly journals The Oxygen Transfer Reaction of 4-Acetylazoxybenzenes in Sulfuric Acid.

2002 ◽  
pp. 463-466 ◽  
Author(s):  
Jiro YAMAMOTO ◽  
Kenji HAMANAKA ◽  
Takasi TSUBOI
Keyword(s):  
Sulfuric Acid ◽  
Oxygen Transfer ◽  
Transfer Reaction

Mechanistic Study of ROS-photogeneration by Pterin

Pteridines ◽  
2011 ◽  
Vol 22 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Hong-Fang Ji ◽  
Liang Shen
Keyword(s):  
Electron Transfer ◽  
Density Functional ◽  
Transfer Reaction ◽  
Direct Electron Transfer ◽  
Density Functional Theory Calculations ◽  
Electron Transfer Reaction ◽  
Mechanistic Study ◽  
Functional Theory ◽  
Direct Energy ◽  
Electronic Parameters

Abstract Pterins are widespread in biological systems and possess photosensitizing activities. In the present study, the photosensitization mechanism of acid form of pterin (PTA) and basic form of pterin (PTB) is investigated by means of density functional theory calculations. The reactive oxygen species-photogenerating pathways of the lowest triplet excited (T1) state PTA and PTB are proposed as follows. Through direct energy transfer, both T1 state PTA and PTB can photogenerate 1O2. Two possible O2 .−-generating pathways are proposed according to the electronic parameters of PTA and PTB: i) direct electron transfer from T1 state PTA and PTB to 3O2 and the electron transfer reaction is more favorable energetically for PTB in comparison with PTA; and ii) electron transfer from anion radical of PTA and PTB to 3O2.

Nickel(II)-Catalyzed Oxygen Transfer Reaction of N-Vinyl Nitrones to Prepare 2-(Pyridin-2-yl)ethanols

2020 ◽  
Vol 22 (21) ◽  
pp. 8446-8450
Author(s):  
Ning Zou ◽  
Jing-Xuan Lan ◽  
Gong-Gui Yan ◽  
Cui Liang ◽  
Gui-Fa Su ◽  
...  
Keyword(s):  
Oxygen Transfer ◽  
Transfer Reaction

scholarly journals Chemical kinetics in solar to chemical energy conversion: The photoelectrochemical oxygen transfer reaction

2020 ◽  
Vol 6 ◽  
pp. 2-12 ◽  
Author(s):  
Ronald Vargas ◽  
David Carvajal ◽  
Lorean Madriz ◽  
Benjamín R. Scharifker
Keyword(s):  
Energy Conversion ◽  
Chemical Kinetics ◽  
Oxygen Transfer ◽  
Transfer Reaction ◽  
Chemical Energy
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