doi:10.3390/molecules27207002engAzpíroz, RamónKaratas, Mert OlgunPassarelli, VincenzoÖzdemir, IsmailPérez-Torrente, Jesús J.Castarlenas, RicardoPreparation of mixed Bis-N-Heterocyclic Carbene Rhodium(I) ComplexesART-2022-130856A series of mixed bis-NHC rhodium(I) complexes of type RhCl(η2-olefin)(NHC)(NHC’) have been synthesized by a stepwise reaction of [Rh(μ-Cl)(η2-olefin)2]2 with two different NHCs (NHC = N-heterocyclic carbene), in which the steric hindrance of both NHC ligands and the η2-olefin is critical. Similarly, new mixed coumarin-functionalized bis-NHC rhodium complexes have been prepared by a reaction of mono NHC complexes of type RhCl(NHC-coumarin)(η2,η2-cod) with the corresponding azolium salt in the presence of an external base. Both synthetic procedures proceed selectively and allow the preparation of mixed bis-NHC rhodium complexes in good yields.2022http://zaguan.unizar.es/record/12012910.3390/molecules27207002http://zaguan.unizar.es/record/120129oai:zaguan.unizar.es:120129info:eu-repo/grantAgreement/ES/DGA-FSE/E42-20Rinfo:eu-repo/grantAgreement/ES/MICINN/PID2019-103965GB-I00/AEI/10.13039/501100011033Molecules 27, 20 (2022), 7002 [15 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess