RT Conference Proceedings T1 Diradicals in the Origin of Chemical Reactions. A1 Medina Rivero, Samara A1 Casado-Cordón, Juan K1 Reactividad (Química) K1 Reacciones químicas - Condiciones y leyes K1 Química física AB Diradicals in the Origin of Chemical ReactionsS. Medina Rivero1, 2, J. Casado Cordón11 Univeristy of Málaga, Department of Physical Chemistry, Málaga, Spain2 University of Sheffield, Department of Physics and Astronomy, Sheffield, United Kingdomπ-Conjugated organic diradicals are appealing systems for organic electronic materials due to thepossibility of tailoring their chemical and physical properties by controlling the interaction betweenthe radical centers in their ground electronic state. The spin-spin interaction can be tuned by theextension of the π-electron delocalization, e.g. increasing the spin-spin distance or includingalternative π-conjugated frameworks, hence providing a direct chemical control through organicsynthesis over the magnitude and sign of this interaction. Unfortunately, bearing two unpairedelectron spins in the ground electronic state is both a blessing and a curse, as it also makes thesespecies highly reactive. Increasing the diradical character usually entails the loss of chemicalstability, making the handling and characterization of these materials very challenging.In this contribution we show how to smartly exploit this high reactivity to obtain new architecturesbased on a dicyanomethylene substituted diazaacene and a bisindenedione compound. Usingelectronic and vibrational spectroscopy we demonstrate that diradical species are the cornerstoneof the mechanism of the chemical reactions described in both cases. YR 2024 FD 2024 LK https://hdl.handle.net/10630/32060 UL https://hdl.handle.net/10630/32060 LA eng NO Comunicación invitada NO MCINJunta de Andalucia Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 21 ene 2026