The electronic structure of carbones revealed: insights from valence bond theory

Valence bond theory reveals the nature of the OC–C bond in carbon suboxide and related allene compounds.

Reactivity of an N-heterocyclic silylene with a 1,1’-ferrocenediyl backbone towards carbonyl compounds, including carbon suboxide

Reactions of a silylene with a ketene and with carbon suboxide are reported, respectively leading to the first silaallene oxide and to a silylketene, whose reaction with water affords the...

Trimerisation of carbon suboxide at a di-titanium centre to form a pyrone ring system

Bis(pentalene)dititanium Ti2(μ:η5,η5-Pn†)2 trimerises carbon suboxide (OCCCO) to form [{Ti2(μ:η5,η5-Pn†)2}{μ-C9O6}], which contains a 4-pyrone core, via the monoadduct [Ti2(μ:η5,η5-Pn†)2 (η2-C3O2)].

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

[U(η5-C5H4SiMe3)3] reductively couples three C3O2 molecules to form a tetranuclear complex with a central cyclobutane-1,3-dione ring, via an intermediate bridging ketene complex.