Dinuclear Rhodium(I)–N-Heterocyclic Carbene Complexes as Alkyne Hydropyridonation Catalysts

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Español-Sánchez B., Karataş M. O., Di Giuseppe A., Togaev U., Passarelli V., Oro L. A., ...More

European Journal of Inorganic Chemistry, 2026 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Publication Date: 2026
  • Doi Number: 10.1002/ejic.202500598
  • Journal Name: European Journal of Inorganic Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, MEDLINE
  • Keywords: halogen bond, hydroamidation, hydropyridonation, N-heterocyclic carbene, shim chemistry
  • Inonu University Affiliated: No

Abstract

A 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.