Oxidative degradation of the ascorbate anion in the presence of platinum and palladium. Formation and structures of platinum and palladium oxalate complexes

被引：20

作者：

Arendse, MJ ^{[1
]}

Anderson, GK ^{[1
]}

Rath, NP ^{[1
]}

机构：

[1] Univ Missouri, Dept Chem, St Louis, MO 63121 USA

来源：

POLYHEDRON | 2001年 / 20卷 / 19期

基金：

美国国家科学基金会;

关键词：

oxidative degradation; platinum; palladium; oxalates;

D O I：

10.1016/S0277-5387(01)00843-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reactions of [Pt(NO3)(2)(dppm)] (dppm = bis(diphenylphosphino)methane) and cis -[Pt(NO3)(2)(PEt3)(2)] with sodium ascorbate are described. Complexes containing O,O-coordinated ascorbate ligands are formed initially, but on standing further oxidation and cleavage of the ligand occur to produce the corresponding oxalate complexes. The reactions were monitored by NMR spectroscopy, and reactions of [Pt(NO3)(2)(dppm)] with oxalic acid or calcium threonate also produced [pt(C2O4)(dppm)]. Reactions of [PtMe(Me2CO)(dppe)](+) or [PdMe(Me2CO)(P (boolean AND) P)](+) (P (boolean AND) P = dppe, dppp) with sodium ascorbate result in cleavage of the M-C bond and oxidation of ascorbate to again produce metal oxalate derivatives. The solid state structures of [Pt(C2O4)(dppm)]. Me2CO, [Pd(C2O4)(dppe)].H2O and [Pd-2(mu -C2O4)(dppp)(2)][BF4](2). 2Me(2)CO, determined by X-ray crystallography, are described. (C) 2001 Elsevier Science Ltd. All rights reserved.

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页码：2495 / 2503

页数：9

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