多态过渡金属碳烯结合超出最小能量路径:旋转轨道相互作用的非局部性
Daisuke Yoshida1,2, Kaito Takahashi1,3
1Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
Inorganic chemistry
|January 13, 2025
概括
旋转轨道效应影响过渡金属碳和二复合体的形成. 计算显示,在 - 合体关联路径上存在旋转屏障,影响反应速率.
科学领域:
- 无机化学 无机化学
- 计算化学的计算化学
- 物理化学 物理化学
背景情况:
- 过渡金属碳和二复合物在生物学和催化中至关重要.
- 对过渡金属的联结合诱导了自旋状态的变化.
- 对这些关联路径的旋转轨道效应仍然未被评估.
研究的目的:
- 为了研究旋转轨道 (SO) 对过渡金属-碳基 (TM-CO) 和过渡金属-二 (TM-N2) 键的关联途径的影响.
- 计算 (Ni) 与一氧化碳 (CO) 和二氧化 (N2) 反应的关联潜在能量曲线.
主要方法:
- 使用了包含旋转轨道 (SO) 相互作用的多参考计算.
- 计算了11个电子状态的关联潜在能量曲线.
- 分析的旋转交叉反应:Ni + CO → NiCO和Ni + N2 → NiN2.
主要成果:
- 最小能量通路 (MEP) 提供了准确的异位能量,但不准确的中间键长图.
- 旋转轨道相互作用在2.3-2.5 Å的纽带长度区域加剧,在交叉点之前.
- 在Ni-adsorbate结合路径上发现了0.15 eV的自旋屏障.
结论:
- 旋转轨道相互作用在TM-连接体协会期间的旋转交叉机制中起着至关重要的作用.
- 已识别的旋转障碍对关联率有显著的影响,可能是数量级.
- 这项研究为转变金属化学中旋转轨道效应的重要性提供了新的视角.
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