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Activation of carbon suboxide (C3O2) by U(III) to form a cyclobutane-1,3-dione ring

Citation:

Tsoureas N, Cloke GFN. Activation of carbon suboxide (C3O2) by U(III) to form a cyclobutane-1,3-dione ring. Chemical Communications. 2018;54(64):8830 - 8833.

Abstract:

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.