REACTION OF AN ALPHA-PYRROLIDONATE-BRIDGED CIS-DIAMMINEPLATINUM(II) DIMER WITH MOLECULAR-OXYGEN AND ITS APPLICATION TO THE CATALYTIC O-2 OXIDATION OF HYDROQUINONE

被引：15

作者：

SAKAI, K ^{[1
]}

TSUBOMURA, T ^{[1
]}

MATSUMOTO, K ^{[1
]}

机构：

[1] WASEDA UNIV,SCH SCI & ENGN,DEPT CHEM,TOKYO 169,JAPAN

来源：

INORGANICA CHIMICA ACTA | 1995年 / 234卷 / 1-2期

关键词：

PLATINUM COMPLEXES; DINUCLEAR COMPLEXES; ALPHA-PYRROLIDONE COMPLEXES; MOLECULAR OXYGEN COMPLEXES; HYDROQUINONE COMPLEXES;

D O I：

10.1016/0020-1693(95)04465-L

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The catalytic effect of [Pt-2(II)(NH3)(4)(C4H6NO)(2)](2+) (Pt-2(II) dimer; C4H6NO = alpha-pyrrolidonate) in the O-2 oxidation of hydroquinone to quinone is investigated at pH 5. Both the O-2 oxidation of this dimer into [Pt-2(III)(NH3)(4)(C4H6NO)(2)(L)(2)](4+) (Pt-2(III) dimer; L=OH2, OH-, SO42-, etc.) and the re-reduction of the Pt-2(III) dimer into the Pt-2(II) dimer by hydroquinone were found to be thermodynamically favorable. With an excess of hydroquinone, the rate of the catalytic reaction exceeds that of the former reaction and is roughly linear to the hydroquinone concentration, suggesting that a certain intermediate formed in the reaction between the Pt-22(II) dimer and O-2 plays a major role in the present catalysis. In addition, hydrolysis equilibria for the axial aqua ligands on the Pt-2(III) dimer are investigated spectrophotometrically.

引用

页码：157 / 161

页数：5

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