Jiménez, Vicente GMayorga-Burrezo, PaulaBlanco, VictorLloveras, VegaGómez-García, Carlos JŠolomek, TomášCuerva, Juan MVeciana, JaumeCampaña, Araceli G2023-02-092023-02-092020-09-23http://hdl.handle.net/10668/16302Thiele (Th) and tetrabenzo-Chichibabin (TBC) derivatives with terminal dibenzocycloheptatriene (DBHept) units were prepared. A clear correlation between their electronic and molecular structures was stablished. Insights into their closed- or open-shell ground states were gained, where particular contribution of the heptagonal carbocycles as end-groups was proved. Remarkably, a thermally accessible triplet diradical configuration was confirmed for the DBHept-TBC compound.enAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/research article32966400open access10.1039/d0cc04489j1364-548Xhttps://pubs.rsc.org/en/content/articlepdf/2020/cc/d0cc04489j