Abstract
While bis(2-mercapto-2,2-diphenyl-ethanoate) dioxomolybdate (VI), {MoO 2[OOCC(S)(C 6H 5) 2] 2} 2− (I), ethanolic solutions stoichiometrically react with aromatic and aliphatic thiols to give the corresponding disulfides, the intercalation of I within a Zn(II)-Al(III) layered double hydroxide (LDH) allows their catalytic oxidation by dioxygen. A reaction scheme is proposed in which a (Mo IVO species activates O 2, regenerating the parent (Mo VIO 2 complex (I), which then acts as a true catalyst. Kinetic data far the thiol oxidation reaction have been determined. The results obtained here demonstrate that the intercalation of I into a Zn(II)-Al(III) LDH host inhibits the formation of catalytically inactive (Mo VO species that are always formed under homogeneous conditions.
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