An-Najah National University

Mohammed Mahmoud Al-Subu'


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  • Sunday, February 1, 2004
  • Osmium(VIII)-catalyzed oxidation of pentamethylene sulfide
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  • Although pentamethylene sulfide (tetrahydrothiopyran) lacks acidic hydrogen, Os-VIII has been found to catalyze its oxidation by alkaline K3Fe(CN)(6) to produce 3-hydroxypentamethylene sulfide as the only product. The kinetics reveal first-order dependence on ferricyanide and Os-VIII, and zero order on pentamethylene sulfide and OH-. The effects of introduced electrolytes, K4Fe(CN)(6), relative permittivity and temperature have also been studied. On the basis of kinetic evidence, a mechanism that involves anation of the osmium catalyst (sulfide/water interchange) followed by intramolecular proton abstraction, followed by an electron transfer step has been proposed and discussed.


    TRANSITION METAL CHEMISTRY    Volume: 29    Issue: 1    Pages: 91-95    Published: FEB 2004  

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Mohammed Mahmoud Al-Subu'
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