Resumen: A 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. Idioma: Inglés DOI: 10.3390/molecules27207002 Año: 2022 Publicado en: Molecules 27, 20 (2022), 7002 [15 pp.] ISSN: 1420-3049 Factor impacto JCR: 4.6 (2022) Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 63 / 178 = 0.354 (2022) - Q2 - T2 Categ. JCR: BIOCHEMISTRY & MOLECULAR BIOLOGY rank: 97 / 285 = 0.34 (2022) - Q2 - T2 Factor impacto CITESCORE: 6.7 - Biochemistry, Genetics and Molecular Biology (Q2) - Chemistry (Q1) - Pharmacology, Toxicology and Pharmaceutics (Q2)