Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Angew Chem Int Ed Engl. 2023 Mar 13;62(12):e202300151. doi: 10.1002/anie.202300151. Epub 2023 Feb 14.
The insertion of ionic compounds into open-cage fullerenes is a challenging task due to the electropositive nature of the cavity. The present work reports the preparation of an open-cage C derivative with a hydroxy group pointing towards the centre of the cavity, which can coordinate to a metal cation, thus acting as a bait/hook to trap the metal cation such as the lithium cation in neutral LiF and the beryllium cation in the cationic [BeF] species. Other metal salts could not be inserted under similar conditions. The structure of MF in the cage was unambiguously determined by single-crystal X-ray diffraction. Owing to its tendency to undergo polycoordination, Li monomer salts have not been isolated before, despite extensive research on Li bonds. The present results provide a unique example of a Li bond.
将离子化合物插入开笼富勒烯是一项具有挑战性的任务，因为笼腔具有正电性。本工作报道了一种具有羟基指向笼腔中心的开笼 C 衍生物的制备，该衍生物可以与金属阳离子配位，从而充当诱饵/钩子来捕获金属阳离子，如中性 LiF 中的锂离子和阳离子 [BeF]物种中的铍离子。在类似条件下，其他金属盐无法插入。MF 在笼中的结构通过单晶 X 射线衍射得到了明确的确定。由于其倾向于发生多配位，尽管对 Li 键进行了广泛的研究，但 Li 单体盐以前并未被分离出来。本结果提供了 Li 键的一个独特例子。
