非经典的基因-碳基联体的性质
María L G Sansores-Paredes1, Michelle P van Dongen1, Celine Nieuwland1
1Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.
Inorganic chemistry
|January 7, 2026
概括
非经典的C-X键收缩发生在有基金属复合物中,其基-碳基连接物. 静电相互作用在π回捐上占主导地位,即使对于更重的带如CS和CSe.
科学领域:
- 无机化学 无机化学
- 有机金属化学 有机金属化学
- 计算化学计算化学
背景情况:
- 在对金属进行协调时,基基联体 (CX,X = O,S,Se) 呈现出经典的 (扩张) 或非经典的 (收缩) C-X 键行为.
- 非经典的碳烯 (CO) 复合物得到了很好的研究,但更重的类似物碳单硫化物 (CS) 和碳化物 (CSe) 的探索较少.
- 这些较重的配体具有较高的π酸度,这表明了新型应用的潜力.
研究的目的:
- 研究[M(CO) 5(CX) ]q复合体中C-X键行为的结合特征和性质.
- 确定在一系列具有不同电荷 (q) 的过渡金属 (M) 中控制C-X债券扩张与收缩的因素.
- 比较这些金属复合体中的CO,CS和CSe连接体的行为.
主要方法:
- 利用了科恩-沙姆分子轨道 (KS-MO) 理论.
- 采用了正统的能量分解分析 (EDA).
- 分析了一系列复合物[M(CO) 5(CX) ]q,其中M = Ti2-, V-, Cr0, Mn+, Fe2+.
主要成果:
- 观察到非经典的C-X债券收缩在阴阳性金属复合体中.
- 发现有利于收缩的静电[M]-CX相互作用在有利于扩张的π-回上占主导地位.
- 这种主导地位甚至适用于CS和CSe配体的较高π酸度.
结论:
- 电子和静电因素决定了这些金属复合体中的C-X键行为.
- 金属中心上的阴离子电荷促进非经典的C-X键收缩.
- 较重的石墨烯-碳烯配体不会改变这种基本的结合趋势.
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