Crystallographic and structural characterization of heterometallic platinum complexes Part VI. Heterohexanuclear complexes

Central European Journal of Chemistry Pub Date : 2014-05-15 DOI:10.2478/s11532-014-0558-7

M. Melnik, P. Mikuš, C. Holloway

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引用次数: 3

Abstract

AbstractThis review classifies and analyzes heterohexanuclear platinum clusters into seven types of metal combinations:Pt5M, Pt4M2, Pt3M3, Pt2M4, PtM5, Pt2M3M′, and Pt2M2M2′. The crystals of these clusters generally belong to six crystal classes: monoclinic, triclinic, orthorhombic, tetragonal, trigonal and cubic. Among the wide range of stereochemistry adopted by these clusters, octahedral and capped square-pyramidal are the most common. Although platinum is classified as a soft metal atom, it bonds to a variety of soft, borderline and hard metals. Nineteen different heterometal ions are involved in hexanuclear platinum clusters. The shortest Pt-M bond distance in the case of M being a non-transition element is 2.395(4) Å for germanium and for M being a transition metal ion it is 2.402(2) Å for Cobalt. The shortest Pt-Pt bond distance observed in these clusters is 2.532 Å. Several relationships between the structural parameters are identified and discussed. Some clusters exist in two isomeric forms and some show crystallographically independent molecules within the same crystal. Such isomers and independent molecules are examples of distortion isomerism.

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异金属铂配合物的晶体学和结构表征。第六部分。杂六核配合物

摘要本文将杂己核铂簇划分为Pt5M、Pt4M2、Pt3M3、Pt2M4、PtM5、Pt2M3M′和Pt2M2M2′七种金属组合。这些团簇的晶体一般属于六个晶类:单斜、三斜、正交、四方、三角和立方。在这些簇所采用的广泛的立体化学结构中，八面体和盖顶方锥体是最常见的。虽然铂被归类为软金属原子，但它能与各种软金属、边缘金属和硬金属结合。六核铂簇中有19种不同的异金属离子。当M为非过渡元素时，锗的最短Pt-M键距为2.395(4)Å，而当M为过渡金属离子时，钴的最短Pt-M键距为2.402(2)Å。在这些簇中观察到的最短Pt-Pt键距离为2.532 Å。确定并讨论了结构参数之间的几种关系。有些团簇以两种同分异构体形式存在，有些在同一晶体中显示出晶体学上独立的分子。这种异构体和独立分子是扭曲异构体的例子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Central European Journal of Chemistry 化学-化学综合

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3 months