一个具有 σ-芳香金属-金属结合的晶体三集群
Josef T Boronski1, John A Seed1, David Hunger2
1Department of Chemistry and Centre for Radiochemistry Research, The University of Manchester, Oxford Road, Manchester, UK.
Nature
|August 23, 2021
概括
研究人员报告了第一个可分离的-键, 形成一个独特的晶体团. 这一发现揭示了一种新型的化物-芳香结合,将这种现象扩展到最重的元素.
科学领域:
- 无机化学
- 量子化学
- 材料科学
背景情况:
- 对于过渡金属和主要组元素而言,金属对金属的结合已经很成熟.
- 理论上预测,乙胺-乙胺结合是弱的,并且仅在极端条件下观察到 (气相,低温矩阵或封装).
- 之前的理论模型专注于局部结合,缺乏实验验证.
研究的目的:
- 在正常条件下实验性地证明和描述动因子-动因子结合.
- 为了研究行为团中的结合性质.
- 探索动因体中的西格玛芳香结合的可能性.
主要方法:
- 在环境条件下合成和分离晶体集群.
- 集群的电子结构和结合的特征.
- 光谱和晶体分析.
主要成果:
- 成功制备和隔离表现出-键的团.
- 星团具有二磁性,封闭外的单体基本状态.
- 实验证据发现了价值移位的三中心二电子西格玛芳香结合,这与先前的理论预测相矛盾.
结论:
- 这项研究报告了在正常条件下首次可分离的动因酸-动因酸结合.
- 发现了化物西格玛芳香结合,使这种结合类型扩展到最重的元素和第六个主要量子数.
- 这项工作为了解和利用动因子-动因子相互作用开辟了新的途径.
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