有很多种方法可以建立五倍纽带
Gabriel Merino1, Kelling J Donald, Jason S D'Acchioli
1Facultad de Química, Universidad de Guanajuato, Noria Alta s/n CP 36050, Guanajuato, Gto. México. gmerino@quijote.ugto.mx
Journal of the American Chemical Society
|November 17, 2007
概括
理论研究表明,五重键在各种RMR分子同位素中存在. 尽管复杂的潜在能量表面和不同的几何形状,金属-金属五重键在不同的配置中保持稳定.
科学领域:
- 无机化学 无机化学 有机化学
- 理论化学 理论化学
- 计算化学计算化学
背景情况:
- 研究过渡金属化合物中的多重结合对于理解化学反应性至关重要.
- 之前的研究已经探讨了四倍债券,但五倍债券仍然不太了解.
研究的目的:
- 从理论上检查RMR分子异构体中五重 (五倍) 键的存在和持久性.
- 阐明这些分子的结构偏好和电子因素.
主要方法:
- 运用计算化学方法研究RMR分子的潜在能量表面.
- 分析包括确定局部最小值,结构偏好和电子交互.
主要成果:
- 该研究确定了RMR分子具有多个局部最小值的复杂潜在能量表面.
- 观察到对横曲形状或桥接R组的偏好,而不是线性几何.
- 发现一个低对称的C ((s) 结构是与横曲异构体一起的共同全球最小值.
结论:
- 金属-金属 (MM) 五重键是强大的,并且在RMMR分子的各种异构体和几何体中持续存在.
- 结构偏好是由最大化MM结合和最小化MR抗结合相互作用之间的平衡决定的.
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