与10组和8组金属的半坐标和素结合
1Department of Chemistry and Biochemistry Utah State University Logan, Utah 84322-0300, USA. steve.scheiner@usu.edu.
Physical chemistry chemical physics : PCCP
|May 30, 2025
概括
方形平面金属复合体表现出与氨的非共价键和与XCCH分子的素键. 结合强度因金属的身份而异,受电子电荷和半坐标相互作用的影响.
科学领域:
- 无机化学 无机化学
- 计算化学计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 合成了带有10组金属 (Ni,Pd,Pt) 和二极管联体的正方形平面复合体.
- 这些系统具有四个金属 - 硫键,创建一个中央金属原子的相互作用.
研究的目的:
- 研究10组金属复合物与氨 (NH3) 和化化合物 (XCCH) 的非共价相互作用.
- 探索金属标识和电子电荷对粘合特性的影响.
- 阐明结合的性质,包括半坐标和素结合.
主要方法:
- 用密度函数理论 (DFT) 的计算来建模电子结构和粘合.
- 对各种金属中心 (Ni, Pd, Pt, Fe, Ru, Os) 的非共价键强度和配置的分析.
主要成果:
- 第10组金属与NH3形成非共价键,强度从Ni (10.8 kcal mol-1) 下降到Pt (1.8 kcal mol-1),与金属电荷相关.
- XCCH分子通过半坐标结合相互作用,其特点是电荷从单一素对转移到金属,在垂直和平行两种配置.
- 与10组金属相比,8组金属与NH3具有更强的共价键. Os形成垂直的XCCH排列,与Fe和Ru不同.
结论:
- 方形平面金属复合体中的非共价相互作用可以根据金属的选择和电子性质进行调整.
- 半坐标结合是金属化分子系统中显著的相互作用.
- 金属身份决定了与NH3和XCCH等小分子相互作用的类型和强度.
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