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- W1998566002 abstract "The relative ligand donor strengths of 10 pyrazole-derived ligands has been determined with great accuracy, making use of the interdependence between the donor strength of the co-ligand and the (13)C NMR chemical shift of the (i)Pr(2)-bimy carbene signal in trans-[PdBr(2)((i)Pr(2)-bimy)L] complexes ((i)Pr(2)-bimy = 1,3-diisopropylbenzimidazolin-2-ylidene; L = pyrazole-derived ligand). Even subtle variations in the substitution pattern of the pyrazole backbone up to three bonds away from the coordinating nitrogen could be detected reliably using this methodology. Alkylation experiments conducted on the pyrazoles using electrophiles of varied reactivity (ethyl bromide, ethyl iodide, and trimethyloxonium tetrafluoroborate) served as a benchmark to rank the pyrazoles in three groups of gradually increasing nucleophilicity, which correlated well with their determined donor strength." @default.
- W1998566002 created "2016-06-24" @default.
- W1998566002 creator A5025613672 @default.
- W1998566002 creator A5082406722 @default.
- W1998566002 date "2012-01-01" @default.
- W1998566002 modified "2023-09-27" @default.
- W1998566002 title "Correlation of spectroscopically determined ligand donor strength and nucleophilicity of substituted pyrazoles" @default.
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- W1998566002 doi "https://doi.org/10.1039/c2dt30526g" @default.
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