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http://dx.doi.org/10.5012/bkcs.2005.26.10.1525

A Novel Method for Preparing of Oxoruthenates Complexes: trans-[RuO3(OH)2]2-, [RuO4]-, (n-Pr4N)+[RuO4]- and [RuO4 and Their Use as Catalytic Oxidants  

Shoair, Abdel-Ghany F. (Department of Chemistry, Faculty of Science, Mansoura University)
Publication Information
Bulletin of the Korean Chemical Society / v.26, no.10, 2005 , pp. 1525-1528 More about this Journal
Abstract
The synthesis and characterization of ${K_3[Ru(C_2O_4)3]{\cdot}4H_2O\;(C_2O_4}^{2-}$ = oxalato anoin) complex are described, and its redox properties (in buffer solution of pH = 12) have been investigated. This complex is used for in situ generation of oxoruthenates complexes which have been characterized by electronic spectroscopy. Reaction of ${K_3[Ru(C_2O_4)3]{\cdot}4H_2O$ with excess ${S_2O_8}^{2-}$ in molar KOH generates trans-${[RuO_3(OH)_2]^{2-}/S_2O_8}^{2-}$ reagent while with excess ${BrO_3}^-$ in molar $Na_2CO_3$ generates ${[RuO_4]^-/BrO_3}^-$ reagent. Avoiding the direct use of [$RuO_4$] the organic-soluble $(n-Pr_4N)^+[RuO_4]^-$, (TPAP) has been isolated by reaction of $K_3[Ru(C_2O_4)3]{\cdot}4H_2O$ with excess ${BrO_3}^-$ in molar carbonate and n-$Pr_4$NOH. In a mixture of $H_2O/CCl_4$ ruthenium tetraoxide can be generated by reaction of $K_3[Ru(C_2O_4)3]{\cdot}4H_2O$ with excess ${IO_4}^-$. The catalytic activities of oxoruthenates that have been made from $K_3[Ru(C_2O_4)3]{\cdot}4H_2O$ towards the oxidation of benzyl alcohol, piperonyl alcohol, benzaldehyde and benzyl amine at room temperature have been studied.
Keywords
Oxoruthenates; Oxidation; N-Methylmorpholine-N-oxide (NMO);
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