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• W2128358210 endingPage "1588" @default.
• W2128358210 startingPage "1578" @default.
• W2128358210 abstract "Abstract A series of Ni and Pd complexes with three different N‐heterocyclic carbene (NHC)‐based ligands (imidazolylidene, benzimidazolylidene and pyrene–imidazolylidene) has been prepared and fully characterized. The influence of the addition of pyrene to solutions containing these complexes is studied by means of NMR and UV/Vis spectroscopies and by cyclic voltammetry. The addition of pyrene to the pyrene–NHC‐containing Pd and Ni complexes gives rise to the formation of adducts by π–π stacking interactions between pyrene and the pyrene group of the NHC ligand. This interaction causes a modification of the electronic properties of the metal, as demonstrated by cyclic voltammetric studies of the Ni–NHC complexes. Theoretical calculations support this type of π‐interactions, and justify the higher interactions observed with the pyrene–NHC containing complexes. The catalytic activities of the complexes were tested in the Suzuki–Miyaura CC coupling and in the α‐arylation of ketones. The addition of pyrene as an external π‐stacking additive does not affect the activities of the complexes in the Suzuki–Miyaura coupling, but this observation may be justified due to the fact that the process is heterogeneously catalyzed, as indicated by the mercury‐drop test. The addition of pyrene to the catalytic α‐arylation of ketones results in a decrease in the activity of the reactions catalyzed by the pyrene–imidazolylidene palladium complex, whereas the other two catalysts do not modify their activity in the presence of this π‐stacking additive." @default.
• W2128358210 created "2016-06-24" @default.
• W2128358210 creator A5013062121 @default.
• W2128358210 creator A5028176146 @default.
• W2128358210 creator A5034526565 @default.
• W2128358210 creator A5064156685 @default.
• W2128358210 date "2014-11-20" @default.
• W2128358210 modified "2023-10-18" @default.
• W2128358210 title "Experimental and Theoretical Approaches to the Influence of the Addition of Pyrene to a Series of Pd and Ni NHC-Based Complexes: Catalytic Consequences" @default.
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• W2128358210 doi "https://doi.org/10.1002/chem.201404618" @default.
• W2128358210 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25413787" @default.
• W2128358210 hasPublicationYear "2014" @default.
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