School of Life Sciences, Division of Chemistry, University of Sussex, Brighton, Falmer BN1 9QJ, UK.
Chem Commun (Camb). 2018 Aug 7;54(64):8830-8833. doi: 10.1039/c8cc04391d.
The activation of C3O2 by the U(iii) complex [U(η5-Cp')3] (Cp' = C5H4SiMe3) is described. The reaction results in the reductive coupling of three C3O2 units to form a tetranuclear complex with a central cyclobutane-1,3-dione ring, with concomitant loss of CO. Careful control of reaction conditions has allowed the trapping of an intermediate, a dimeric bridging ketene complex, which undergoes insertion of C3O2 to form the final product.
描述了 U(iii) 配合物 [U(η5-Cp')3]（Cp'=C5H4SiMe3）对 C3O2 的激活。反应导致三个 C3O2 单元的还原偶联，形成具有中央环丁烷-1,3-二酮环的四核配合物，同时失去 CO。通过仔细控制反应条件，可以捕获中间体，即二聚桥接的烯酮配合物，它经历 C3O2 的插入形成最终产物。
