Synthesis of Ir Catalysts Featuring Amide-functionalized NHC Ligands and Survey of their Activity on Formic Acid Dehydrogenation

García-Abellán, Susana ; Passarelli, Vincenzo ; Iglesias, Manuel

Resumen: 2 a and 2 b, [Ir(CI)(COD)(NHC)] (COD=1,5-cyclooctadiene), have been prepared via transmetallation from NHC−Ag complexes. [Rh(CI)(COD)(NHC)] (4) was prepared analogously. [Ir({κ-C,N-(NHC-acetamide−1H)}(COD)] (3 c) has been synthesized via transmetallation from the deprotonated NHC−Ag complex. [IrCp*({κ-C,N-(NHC-acetamide−1H)}] (5) (Cp*=pentamethylcyclopentadienyl), has been obtained analogously. [Ir(CI)(CO)2(NHC)] (6) and [Ir({κ-C,N-(NHC-acetamide−1H)}(CO)2] (7) have been prepared by carbonylation of 2 b and 3 c, respectively. The catalytic activity of these complexes has been evaluated in the dehydrogenation of formic acid, under solventless conditions, in the presence of water as a cosolvent, and in a 5 : 2 HCOOH/Et3N mixture, with the best TOF values being obtained in the case of the latter. Stoichiometric experiments suggest COD hydrogenation as the preactivation step.

Idioma: Inglés

DOI: 10.1002/ejic.202300111

Año: 2023

Publicado en: European Journal of Inorganic Chemistry 26, 20 (2023), e202300111 [10 pp.]
ISSN: 1434-1948

Factor impacto JCR: 2.2 (2023)

Categ. JCR: CHEMISTRY, INORGANIC & NUCLEAR rank: 23 / 44 = 0.523 (2023) - Q3 - T2

Factor impacto CITESCORE: 4.3 - Inorganic Chemistry (Q2)

Factor impacto SCIMAGO: 0.481 - Inorganic Chemistry (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E42-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2021-126212OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RTI2018-099136-A-I00

Tipo y forma: Artículo (PostPrint)