doi:10.1002/ejic.202500598engEspañol-Sánchez, BelindaKaratas, Mert OlgunDi Giuseppe, AndreaTogaev, UlugbekPassarelli, VincenzoOro, Luis A.Pérez-Torrente, Jesús J.Castarlenas, RicardoDinuclear Rhodium(I)–N-Heterocyclic Carbene Complexes as Alkyne Hydropyridonation CatalystsART-2026-148175A series of new RhI–N-Heterocyclic carbene dinuclear complexes of type [Rh(µ-Cl)(η2-coe)(NHC)]2, containing IPrBIAN, IPrCl, and IPr* ligands, has been prepared. The crystal structure of the IPrCl functionalized rhodium–dinuclear complex reveals an intermolecular Cl···Cl halogen bond. The chlorido-bridges can be cleaved by pyridine to afford the corresponding mononuclear derivatives RhCl(η2-coe)(NHC)(py). These complexes are efficient alkyne hydropyridonation catalysts, with the IMes complex exhibiting the highest reactivity within the series. © 2026 The Author(s). European Journal of Inorganic Chemistry published by Wiley-VCH GmbH.2026http://zaguan.unizar.es/record/16875310.1002/ejic.202500598http://zaguan.unizar.es/record/168753oai:zaguan.unizar.es:168753info:eu-repo/grantAgreement/ES/DGA/E42-23Rinfo:eu-repo/grantAgreement/ES/MICINN/PID2022-137208NB-I00info:eu-repo/grantAgreement/ES/MICIU/AEI/10.13039/501100011033European Journal of Inorganic Chemistry (2026), e202500598 [12 pp.]by-nc-ndhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.esinfo:eu-repo/semantics/openAccess