Levi Elena, Aurbach Doron, Gatti Carlo
Department of Chemistry , Bar-Ilan University , Ramat-Gan 5290002 , Israel.
CNR-ISTM Istituto di Scienze e Tecnologie Molecolari , via Golgi 19 , Milano I-20133 , Italy.
Inorg Chem. 2018 Dec 17;57(24):15550-15557. doi: 10.1021/acs.inorgchem.8b02874. Epub 2018 Nov 27.
Pauling's principles developed later in the bond valence model (BVM) are fundamental in description of bonding in ionic solids and surface phenomena on metals, but applicability of these principles to the metal-metal bonds in the bulk compounds was demonstrated only recently, with a spotlight on the bond valence-bond length correlations. This work is focused on the bond order conservation in cluster compounds and determination of empiric bond valence parameters for the metal-metal bonds, which ensure very simple and reasonably accurate bonding analysis, with zero cost, in any complex cluster compound. Such peculiarities of cluster compounds as matrix effect and nonuniform distribution of the ionic charges (bond valence sums) on the ligands around metal clusters, as well as other important examples of the BVM application to compounds with metal-metal bonds, are discussed.
鲍林原理后来在键价模型（BVM）中得到发展，这些原理对于描述离子固体中的键合以及金属表面现象至关重要，但直到最近才证明了这些原理在块状化合物中金属 - 金属键上的适用性，重点是键价 - 键长相关性。这项工作聚焦于簇合物中的键级守恒以及金属 - 金属键的经验键价参数的确定，这确保了在任何复杂簇合物中都能以零成本进行非常简单且合理准确的键合分析。本文讨论了簇合物的一些特性，如基体效应和金属簇周围配体上离子电荷（键价和）的非均匀分布，以及BVM应用于具有金属 - 金属键化合物的其他重要示例。
