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New Way for Probing Bond Strength

机译:探测债券强度的新方法

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摘要

The covalent chemical bond is intimately linked to electron sharing between atoms. The recent independent gradient model (IGM) and its delta g descriptor provide a way to quantify locally this electron. density interpenetration from wavefunction calculations. Each bond has its own IGM-delta g(Pair) signature. The present work establishes for the first time a strong link between this bond signature and the physically grounded bond force constant concept. Analyzing a large set of compounds and bonds, the intrinsic bond strength index (IBSI) emerges from the IGM formulation. Our study shows that the IBSI does not belong to the class of conventional bond orders (like Mulliken, Wiberg, Mayer, delocalization index, or electron localization function-ELF), but is rather a new complementary index, related to the bond strength. A fundamental outcome of this research is a novel index allowing to range all two-center chemical bonds by their intrinsic strength in molecular situation. We believe that the IBSI is a powerful and robust tool for interpretation accessible to a wide community of chemists (organic, inorganic chemistry, including transition-metal complexes and reaction mechanisms).
机译:共价化学键与原子之间的电子共享密切相关。最近的独立梯度模型(IGM)及其ΔG描述符提供了一种方式来定量本地电子。密度互通从波消旋计算。每个键都具有自己的IGM-DELTA G(对)签名。本工作在该债券签名和物理接地债券恒定概念之间首次建立了强大的联系。分析大量化合物和键,内在键合强度指数(IBSI)从IgM制剂中出现。我们的研究表明,IBSI不属于传统债券订单的类别(如Mulliken,Wiberg,Mayer,临床化指数或电子定位功能-ELF),但与粘合强度相关的新互补指数。本研究的基本结果是一种新颖的指标,允许通过它们在分子情况下的内在强度来度占所有两中心化学键。我们认为,IBSI是一种强大而强大的工具,可供广泛的化学家社区访问(有机,无机化学,包括过渡金属配合物和反应机制)。

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