沉重的icosagen嵌入在平面:多中心键可以加强平面性吗?
Amlan J Kalita1, Ankur K Guha2, Hemanta Hazarika1
1Department of Chemistry, Nabajyoti College, Kalgachia, Assam, 781319, India.
Journal of molecular graphics & modelling
|March 10, 2026
概括
化学家在新的Li5M2+星团中发现平面五坐标的和. 多中心结合,而不是芳香性,稳定了这些独特的结构,为超协调化学提供了新的见解.
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:
- 主要组元素中的平面超协调具有独特的结构特征.
- 芳香性通常被认为是稳定平面超协调物种的必要条件.
研究的目的:
- 研究Li5M2+ (M = In, Tl) 集群的全球最小结构.
- 探索平面五坐标 (ppIn) 和 (ppTl) 物种的结合和稳定性.
- 确定多中心结合与芳香性在实现平面超协调中的作用.
主要方法:
- 全球结构搜索.
- 密度函数理论 (DFT) 的计算.
- 能量分解分析 (EDA).
主要成果:
- 确定了Li5In2+和Li5Tl2+具有平面五坐标和 (ppIn和ppTl) 的全球最小结构.
- 这些集群通过多中心结合稳定,独立于芳香度.
- 在Li-In和Tl-In键中观察到显著的共价性质.
- 这些星团表现出动力稳定性.
- 在相关的联结体支持的复合体中保持平面性,Li2M(Cp) 2.
结论:
- 多中心结合足以稳定平面超协调,挑战了芳香的必要性.
- 这些发现扩大了对超协调主要组元素化合物的理解.
- 鉴定到的结构和粘合模式对设计新型无机材料有影响.
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