doi:10.1002/anie.202206831engHidalgo, NereidaMoreno, Juan JoséGarcía-Rubio, InésCampos, JesúsEnhanced Dihydrogen Activation by Mononuclear Iridium(II) Compounds: A Mechanistic StudyART-2022-129510The organometallic chemistry of 4d and 5d transition metals has been vastly dominated by closed-shell states. The reactivity of their metalloradical species is though remarkable, albeit yet poorly understood and with limited mechanistic investigations available. In this work we report the synthesis and characterization of two mononuclear IrII species, including the first dinitrogen adduct. These compounds activate dihydrogen at a dissimilar rate, in the latter case several orders of magnitude faster than its IrI precursor. A combined experimental/computational investigation to ascertain the mechanism of this transformation in IrII compounds is reported.2022http://zaguan.unizar.es/record/13156710.1002/anie.202206831http://zaguan.unizar.es/record/131567oai:zaguan.unizar.es:131567info:eu-repo/grantAgreement/EC/H2020/756575/EU/Cooperative Catalysis: Using Interdisciplinary Chemical Systems to Develop New Cooperative Catalysts/CoopCatThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 756575-CoopCatinfo:eu-repo/grantAgreement/ES/MCIU/PID2019-110856GA-I00ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 61, 35 (2022), e202206831 [7 pp.]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess