Oxidation of ascorbic acid by a (salen)ruthenium(VI) nitrido complex in aqueous solution.
The oxidation of ascorbic acid (H2A) by [Ru(VI)(N)(L)(MeOH)](+) in aqueous acidic solutions has the following stoichiometry: 2[Ru(VI)(N)] + 3H2A → 2[Ru(III)(NH2-HA)](+) + A. Mechanisms involving HAT/N-rebound at low pH (≤2) and nucleophilic attack at the nitride at high pH (≥5) are proposed.
Institute of Molecular Functional Materials, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, P. R. China. bhtclau@cityu.edu.hk.
Qian
Q
Wang
Wai-Lun
WL
Man
William W Y
WW
Lam
Tai-Chu
TC
Lau
D001205:Ascorbic Acid / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D005029:Ethylenediamines / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008968:Molecular Conformation; D010084:Oxidation-Reduction; D012428:Ruthenium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D056831:Coordination Complexes; D005029:Ethylenediamines; D014867:Water; D012428:Ruthenium; C011452:disalicylaldehyde ethylenediamine; D001205:Ascorbic Acid