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Valence shell electron-pair repulsion theory (VSEPR theory) enables us to predict the molecular structure around a central atom from an examination of the number of bonds and lone electron pairs in its Lewis structure. The VSEPR model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between these electron pairs by maximizing the distance between them. The electrons in the valence shell of a central atom form either bonding...
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一个平面五坐标的硫原子.

Palash J Thakuria1, Kangkan Sarmah1, Siddharth K Purkayastha1

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概括
此摘要是机器生成的。

研究人员在[Mg5S6]2-集群中发现了一个稳定的平面五坐标硫原子 (ppS). 这一发现为实验检测这种罕见的原子配置开辟了新的途径.

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科学领域:

  • 无机化学 无机化学
  • 计算化学的计算化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 平面五坐标硫原子 (ppS) 在化学中非常罕见.
  • 迄今为止,只有一个对ppS的实验验证存在.

研究的目的:

  • 报告发现了一种新的平面五坐标硫原子 (ppS).
  • 为了研究[Mg5S6]2-集群的稳定性和结构性质.

主要方法:

  • 全球结构搜索以确定最小能量配置.
  • 密度函数理论 (DFT) 计算用于电子结构分析.
  • 对称性分析以确认D5h点组.

主要成果:

  • [Mg5S6]2-星团的全球最小结构具有一个平面五坐标的硫原子.
  • 星团表现出完美的D5h对称性.
  • 电子结构计算表明Mg-S债券中存在显著的共价性.
  • 离子集群对电子脱离是稳定的,这表明实验可行性.

结论:

  • [Mg5S6]2-集群代表了平面五坐标硫的稳定和实验上可访问的形式.
  • 这些发现挑战了对硫协调化学的现有理解.
  • 这一发现为未来的实验合成和表征提供了一个有希望的目标.