NMR Spectroscopic Evidence of Lewis Acid-Lewis Base Complex Formation of Perfluoroborane with Uranyl beta-Diketonato Complexes

作者：Miyamoto Naomi; Tsukahara Takehiko; Ikeda Yasuhisa^*

来源：Chemistry Letters, 2012, 41(5): 513-515.

DOI：10.1246/cl.2012.513

Interactions between B(C6F5)(2)OH and [UO2(dfh)(2)(dmso)] or [UO2(acac)(2)(dmso)] in toluene have been investigated by B-11- and F-19 NMR measurements. The results showed that one or two B(C6F5)(2)OH molecules coordinate to the oxo ligands of [UO2(acac)(2)(dmso)] through B, i.e., O=U=O center dot center dot center dot B (1:1) and B center dot center dot center dot O=U=O center dot center dot center dot B (2:1) complexes based on Lewis acid-Lewis base (LA-LB) interactions are formed, while such LA-LB interactions are not observed in [UO2(dfh)(2)(dmso)]. Furthermore, it was clarified that the 2:1 complex becomes predominant with decreasing temperatures.

• 出版日期2012-5-5