Oxidation of aldoses with bromine

Oxidation of Aldoses With Bromine

Rates of oxidation of aldoses with bromine have bee n reappraised and inte rpreted in th e light of present concepts of conformation and reaction mechanism. It is suggested that differences in t he rates of ox idation of the a and /3 anomers are largely determin ed by differences in the free energy req uired by the reactants for passing from the ground state to the com plex in the transition st...

N-Bromosaccharin oxidation of some aldoses: A kinetic study

Kinetics of oxidation of some aldoses viz. Dribose, Dxylose, L – arabinose and Dglucose by Nbromosaccharin in aqueous acetic medium in the presence of mercuric acetate as a scavenger for Br-, exhibits first order dependence in [NBSA] and [HC1O4]. The order with respect to aldose varies from 1 to 0. The reaction rate is retarded by the addition of saccharin. Effect of variation of composition of...

Bromine-induced oxidation of mercury above the Dead Sea

Measurement-based modeling of bromine-induced oxidation of mercury above the Dead Sea E. Tas, D. Obrist, M. Peleg, V. Matveev, X. Faı̈n, D. Asaf, and M. Luria The Institute of Earth Sciences, The Hebrew University, Jerusalem, Israel Department of Environmental Sciences and Energy, The Weizmann Institute of Science, Israel Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio P...

The Preparation of Hexonic and Rionic Acids by Oxidation of Aldoses with Barium Hypoiodite

Global atmospheric model for mercury including oxidation by bromine atoms

Global models of atmospheric mercury generally assume that gas-phase OH and ozone are the main oxidants converting Hg0 to HgII and thus driving mercury deposition to ecosystems. However, thermodynamic considerations argue against the importance of these reactions. We demonstrate here the viability of atomic bromine (Br) as an alternative Hg0 oxidant. We conduct a global 3-D simulation with the ...