Possible role of nitrateitrite redox cycles in catalytic and selective sulfoxidation reaction Metallic nitrates and bromides as redox mediators:a comparative study

摘要

Different combinations of metallic nitrates and bromides were used as redox mediators in the conversion of sulfides to sulfoxides.The metal salts were used incatalytic amounts in the oxidation reaction.It is suggested tht in the oxidation and oxygenation processes are involved species originated from the nitrateitrite redox cycles and/or the dissolved atmospheric dioxygen and/or coordinated water molecules,all in combination with the redox couple 2Br~--><-Br_2+2e~-.The utilized metallic centers showed distinct reactivity;Fe~(III)appears as the best metallic center.