贵重气体协调过渡金属复合体离子的内在稳定性
1Contribution from the Department of Chemistry, National Chung Cheng University, Chia-Yi, Taiwan 621. chewph@ccunix.ccu.edu.tw
Journal of the American Chemical Society
|July 18, 2001
概括
计算化学揭示了与相协调的金复合物是稳定的. 这些发现表明材料科学中可能存在新型贵重气体化合物.
科学领域:
- 计算化学计算化学
- 无机化学 无机化学 有机化学
- 量子化学 是一个量子化学.
背景情况:
- 传统上被认为是惰性气体的高贵气体可以形成具有高电子负元素的稳定化合物.
- 过渡金属复合体提供独特的电子环境,以稳定不寻常的氧化状态和粘合.
- 了解高贵气体金属复合物的稳定性对于探索新的化学前沿至关重要.
研究的目的:
- 调查协调金复合的稳定性和结构性质.
- 探索合成新型过渡金属复合物的潜力,其中包括诸如和之类的贵重气体.
- 确定在这些假设复合体中结合联体的能量优势.
主要方法:
- 使用密度函数理论 (DFT) 和高层次的初始计算.
- 几何优化是使用方位配置与单元和双元交互 (QCISD(T)) 方法进行的.
- 结合集群单双 (三重) 激发 (CCSD(T)) 计算用于确定连接体结合能量.
主要成果:
- 计算了对[AuXe4]2+的金-键长度,与实验晶体学数据密切匹配.
- 预计[AuXe4]2+ (229 kcal/mol),[AuXe4]3+ (565 kcal/mol) 和[PtXe4]2+ (233 kcal/mol) 的高联结能是可以预测的.
- 发现更高层次的关联效应对于准确的几何参数预测至关重要.
结论:
- 这项研究证实了协调金复合的内在稳定性.
- 结果表明,在不同的氧化状态下,各种过渡金属复合物与或可能是稳定的.
- 这项研究为新型贵重气体化合物的合成和应用开辟了道路.
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