含鈹鐵鍵的BeFe(CO)4-陰離子的形成與表徵
作者:
小柯機器人發布時間:2021/1/7 13:48:55
來自復旦大學的周鳴飛課題組近日成功實現了含鈹鐵鍵的BeFe(CO)4-陰離子的合成與表徵。2021年1月05日,國際知名學術期刊《德國應用化學》發表了這一成果。
研究人員在氣相中成功製備了異核BeFe(CO)4-陰離子複合物,並在質量選擇性紅外光解光譜的羰基伸縮頻段探測到了其存在。通過表徵發現,該複合物具有一個含Be-Fe鍵的BeFe(CO)4-結構,該結構為C3v對稱性,且四個羰基配體都與鐵原子中心成鍵。
進一步量子化學研究表明,該複合物的Be-Fe鍵很短。除了一個電子共享的σ鍵,還存在兩個其他的弱Be←Fe(CO)4-配價π鍵相互作用。這一發現暗示著s區元素和過渡金屬之間的金屬-金屬鍵在合適的配位環境下是可以存在的。
附:英文原文
Title: Formation and Characterization of BeFe(CO)4‐ Anion with Beryllium‐Iron Bonding
Author: Mingfei Zhou, Guanjun Wang, Jing Zhao, Han-Shi Hu, Jun Li
Issue&Volume: 05 January 2021
Abstract: Heteronuclear BeFe(CO) 4 ‐ anion complex is generated in the gas phase, which is detected by mass‐selected infrared photodissociation spectroscopy in the carbonyl stretching frequency region. The complex is characterized to have a Be‐Fe bonded Be‐Fe(CO) 4 ‐ structure with C 3v symmetry and all of the four carbonyl ligands bonded on the iron center. Quantum chemical studies indicate that the complex has a quite short Be‐Fe bond. Besides one electron‐sharing σ bond, there are two additional, albeit weak, Be Fe(CO) 4 ‐ dative π bonding interactions. The findings imply that metal‐metal bonding between s‐block and transition metals is viable under suitable coordination environment.
DOI: 10.1002/anie.202015760
Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202015760