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Updated: Jan 14, 2026

Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry

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克拉I) - 克拉I) 基桥复合体:一个破碎对称的DFT和多确定性CASSCF/NEVPT2握手

Andrej Hlinčík¹, Michal Malček¹, Karol Lušpai¹

¹Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37 Bratislava, Slovak Republic.

|October 27, 2025

概括

本研究使用先进的计算方法研究基于的系统. 结果显示单点是基本状态,不同的Cr-Cr键长度由不同的计算类型预测.

科学领域:

无机化学无机化学有机化学
计算化学的计算化学
量子化学是一个量子化学.

背景情况:

重新检查一种 (I) - (I) 系统,其稳定性由烯连接体.
了解低价值过渡金属复合体中的电子结构和粘合.

研究的目的:

评估各种多确定性ab initio和DFT方法的性能,以描述一个CrI-CrI系统.
为了始终确定旋转状态的排序,磁相互作用和优化几何.

主要方法:

开始计算的多决定因素:完整的活性空间自我一致场 (CASSCF) 和N电子价值扰动理论2 (NEVPT2).
密度函数理论 (DFT) 计算:包括BLYP,B3LYP, ωB97X-D,M06-2X,和B3LYP-GD3函数.
破碎对称 (BS) DFT用于单个基准状态分析.

主要成果:

所有方法都始终在Cr{I}-Cr{I}部分内确定单个基态与反铁磁合.
CASSCF和BS单点BLYP方法准确地预测了Cr-Cr键的顺序和实验几何 (dCr-Cr ~ 1.7 Å).
单元CASSCF和BS单元B3LYP产生较长的Cr-Cr键长 (>2.5 Å),而受限制的单元B3LYP/BLYP显示不稳定.

结论:

多确定性ab initio和DFT方法为CrI-CrI系统的电子和几何性质提供了一致的见解.
计算方法的选择显著影响预测的Cr-Cr键长度和电子移位.
为准确描述这种低价值系统的实验几何,建议使用BS单元 DFT 和 NEVPT2.

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