关于铬族元素双原子基元中六重键作用的讨论

Discussion on Sextuple Bonding in Diatomic Motifs of Chromium Family Elements

铬族元素的Cr_(2)、Mo_(2)、W_(2)基团具有相对稳定性,科学家对此做了实验验证和理论计算,试图找出原因。本文梳理了相关研究脉络及最新进展,从“它们的成键方式如何?”以及“可以怎样被进一步稳定?”两个问题出发,对铬族元素中的双原子基团六重键作用进行了分析、归纳和讨论。作者认为,Cr_(2)、Mo_(2)、W_(2)基团的不稳定性来源于两原子间密集电子的斥力;因此,各种稳定该基团的方法本质上都是从减小电子密度、解决电子斥力入手。

Numerous experimental and theoretical studies have been conducted to explore the bonding models and relative stability of Cr_(2),Mo_(2),W_(2) groups within chromium family.This paper reviews the current research trajectory and recent advancements,specially focusing on their bonding configurations and strategies for further stabilization.The analysis suggests that the instability of Cr_(2),Mo_(2),W_(2) groups results from the electron repulsion in tightly packed electrons between the two individual atoms.Thus,approaches to stabilize these molecules fundamentally aim to reduce electron density and mitigate electron-electron repulsion.