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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 10
BKCSDE 26(10)
October 20, 2005 

A Novel Method for Preparing of Oxoruthenates Complexes: trans-[RuO3(OH)2]2-, [RuO4]-, (n-Pr4N)+[RuO4]- and [RuO4] and Their Use as
Abdel-Ghany F. Shoair
Oxoruthenates, Oxidation, N-Methylmorpholine-N-oxide (NMO)
The synthesis and characterization of K3[Ru(C2O4)3]·4H2O (C2O42- = 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 K3[Ru(C2O4)3]·4H2O with excess S2O82- in molar KOH generates trans-[RuO3(OH)2]2-/S2O82- reagent while with excess BrO3- in molar Na2CO3 generates [RuO4]-/BrO3- reagent. Avoiding the direct use of [RuO4] the organic-soluble (n-Pr4N)+[RuO4]-, (TPAP) has been isolated by reaction of K3[Ru(C2O4)3]·4H2O with excess BrO3- in molar carbonate and n-Pr4NOH. In a mixture of H2O/CCl4 ruthenium tetraoxide can be generated by reaction of K3[Ru(C2O4)3]·4H2O with excess IO4-. The catalytic activities of oxoruthenates that have been made from K3[Ru(C2O4)3]·4H2O towards the oxidation of benzyl alcohol, piperonyl alcohol, benzaldehyde and benzyl amine at room temperature have been studied.
1525 - 1528
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