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KMID : 1059519890330050516
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Journal of the Korean Chemical Society
1989 Volume.33 No. 5 p.516 ~ p.521
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Conversion of Coordinated Sulfur Atom into Sulfoxide Group via Oxidation Reaction of Metal Complexes of Tetradentates and Sulfur Amino Acids
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Lee Sung-Sil
Peter P. Fu
Choi Sung-Rack
Jun Moo-Jin
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Abstract
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Reaction between the N2O2-type tetradentate ligand, ethylenediamine-N,N'-di-S-α-isobutylacetic acid (SS-emiba) and RhCl3·3H2O has yielded △-s-cis- and Λ-uns-cis-[Rh(SS-eniba)Cl2]-. △-s-cis-[Rh(SS-eniba)Cl2]- has been utilized to react with S-methyl-L-cystcine(Smc) to give △-s-cis-[Rh(SS-eniba(Smc)]+. The oxidation of △-s-cis-[Rh(SS-eniba(Smc)]+ using H2O2 has produced △-s-cis-[Rh(SS-eniba)(Smc-o)]+, in which the coordinated sulfur has been converted into the sulfoxide group. In a separate series of experiments the S-methyl-L-cysteine is oxidized by H2O2 to give S-methyl-L-cysteine sulfoxide, which is then coordinated to △-s-cis-[Rh(SS-eniba)Cl2]- to make the standard complet of △-s-cis-[Rh(SS-eniba)(Sme-o)]+ for comparison with the complex obtained from the oxidation of △-s-cis-[Rh(SS-eniba)(Smc)]+ by H2O2.
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