Half- and Mixed-Sandwich Uranium Permethylpentalene Compounds
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- 作者：F. Mark Chadwick ; Dermot M. O鈥橦are
- 刊名：Organometallics
- 出版年：2014
- 出版时间：July 28, 2014
- 年：2014
- 卷：33
- 期：14
- 页码：3768-3774
- 全文大小：390K
- ISSN：1520-6041
文摘
The synthesis and characterization of a series of U(IV) permethylpentalene complexes has been enabled by the development of an effective synthesis of the new Pn*U synthon [Pn*U(渭-Cl)4][Li(TMEDA)]2, which has allowed access to a set of half-sandwich Pn*U complexes. The compounds have been characterized via variable-temperature NMR and in some cases by structural analysis. The temperature dependence of the NMR solution spectra show a complex interplay between fluxional ligand dynamics and the effects of a paramagnetic f2 uranium center.