Preparation and structural studies of organotin(IV) complexes formed with organic carboxylic acids
Preparation and structural studies of organotin(IV) complexes formed with organic carboxylic acids
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有机羧酸形成的有机锡(IV)配合物的制备及结构研究
DOI：
10.1023/a:1023315704880
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Yoshida
中科院分区：
文献类型：
--
作者：
A. Szorcsik;L. Nagy;L. Pellerito;T. Yamaguchi;K. Yoshida
用两种不同的方法合成了六种含{O，O}配体的有机羧酸与Bu_2Sn（IV）_2 ~+和Ph_3Sn（IV）_2 ~+的配合物，配体与金属的比例分别为1：1和1：2。红外光谱和拉曼光谱清楚地表明有机锡（IV）部分与配体的{O，O}原子反应。结果发现，在大多数情况下，-COO-基团被螯合到中心金属离子，但有时也观察到单齿配位。配合物的形成伴随着存在于配体中的氢键网络的重排。配合物可能具有聚合物结构。比较实验穆斯堡尔D值与那些计算的基础上的点电荷模型形式主义显示，有机锡（IV）部分有一个三角双锥（tbp）的几何形状，在某些情况下，四面体（tetr）的几何形状了。最后，用EXAFS方法确定了顺丁烯二酸与Bu_2Sn（IV）_2 ~+形成配合物的局域结构.
The complexes of six organic carboxylic acids (containing {O,O} donor atoms) with Bu2Sn(IV)2+and Ph3Sn(IV)+with ligand to metal ratios of 1 : 1 and 1 : 2, were prepared by two different methods. The FtIR and Raman spectra clearly demonstrated that the organotin(IV) moieties react with the {O,O} atoms of the ligands. It was found that in most cases the -COO-group was chelated to the central metal ions, but monodentate coordination was also sometimes observed. Complex formation was accompanied by a rearrangement of the hydrogen-bonding network existing in the ligands. The complexes probably have polymeric structures. Comparison of the experimental Mössbauer D values with those calculated on the basis of the point charge model formalism revealed that the organotin(IV) moiety has a trigonal-bipyramidal (tbp) geometry, and in certain cases a tetrahedral (tetr) geometry too. Finally, the local structure of the maleic acid complex formed with Bu2Sn(IV)2+was determined by an EXAFS method.