Diffusion Nuclear Magnetic Resonance Measurements on Cationic Gold (I) Complexes in Catalytic Conditions: Counterion and Solvent Effects.

ABSTRACT: The amount of free ions, ion pairs, and higher aggregate of the possible species present in a solution during the gold(I)-catalyzed alkoxylation of unsaturated hydrocarbon, i.e., ISIP (inner sphere ion pair) [(NHC)AuX] and OSIP (outer sphere ion pairs) [(NHC)Au(TME)X] [NHC 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene; TME = tetramethylethylene (2,3-bis methyl-butene); X^- = Cl^-, BF₄^-, OTf^-; and OTs^- BArF₄^- (ArF = 3,5-(CF₃)₂C₆H₃)], has been determined. The ¹H and ¹⁹F DOSY NMR measurements conducted in catalytic conditions indicate that the dissociation degree (α) of the equilibrium ion pair/free ions {[(NHC)Au(TME)X] [(NHC)Au(TME)]

SUBMITTER: Campagnolo F 

PROVIDER: S-EPMC11243661 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature