Evidence for Photocatalyst Involvement in Oxidative Additions of Nickel-Catalyzed Carboxylate <i>O</i> -Arylations
Jamal A. Malik, Amiera Madani, Bartholomäus Pieber, Peter H. Seeberger
Abstract
supports a turnover-limiting reductive elimination. Graphitic carbon nitride gave higher selectivity, even at high photocatalyst-to-nickel ratios. The heterogeneous reaction also showed a rate dependence on aryl halide, indicating that oxidative addition plays a role in rate determination. The results argue against the current mechanistic hypothesis, which states that the photocatalyst is only involved to trigger reductive elimination.
Topics & Concepts
ChemistryPhotocatalysisCatalysisNickelCatalytic cycleGraphitic carbon nitrideCarboxylateRate-determining stepPhotochemistryKineticsTurnover numberCarbon nitrideOxidative additionInorganic chemistryOrganic chemistryPhysicsQuantum mechanicsRadical Photochemical ReactionsSulfur-Based Synthesis TechniquesAdvanced Photocatalysis Techniques