Zhang Qingnan, Li Wan-Lu, Zhao Lili, Chen Mohua, Zhou Mingfei, Li Jun, Frenking Gernot
Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, P. R. China.
Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, P. R. China.
Chemistry. 2017 Feb 10;23(9):2035-2039. doi: 10.1002/chem.201605994. Epub 2017 Jan 23.
Short interatomic distances below standard values for a single bond are usually identified with double or triple bonds. The synthesis and spectroscopic characterization of a molecule is reported where the distance between two beryllium atoms is shorter than a standard double bond but there is no bond. The cyclic diberyllium dioxide Be O molecule, which is coordinated by two noble gas atoms in Ng-Be O -Ng' (Ng, Ng'=Ne, Ar, Kr, Xe) was isolated and spectroscopically identified in low-temperature matrices. The complexes possess very short Be-Be distances, but the analysis of the electronic structure reveals that there is no chemical bond.
低于单键标准值的短原子间距离通常与双键或三键相关。本文报道了一种分子的合成及其光谱表征，其中两个铍原子之间的距离比标准双键短，但不存在化学键。在低温基质中分离并通过光谱鉴定了由两个稀有气体原子在Ng-BeO-Ng'（Ng，Ng' = Ne、Ar、Kr、Xe）中配位的环状二氧化二铍Be₂O分子。这些配合物具有非常短的Be-Be距离，但电子结构分析表明不存在化学键。
