The nucleophilic aromatic substitution reaction between 1-fluoro-2,4-dinitrobenzene and ethanol was examined in a series of ionic liquids across a range of mole fractions. Temperature-dependent kinetic analyses were undertaken to determine the activation parameters for this reaction at the highest mole fraction. As the mole fraction of ionic liquid was increased, the rate constant of the reaction also increased, however the microscopic origin of the rate enhancement was shown to be different between different ionic liquids and also between different solvent compositions. These results indicate a balance between microscopic interactions that result in the observed solvent effects and a qualitative method for analysing such interactions is introduced.
The solvent effects of solvate ionic liquids have been compared to the effects of previously studied ‘typical’ ionic liquids for the SN2 reaction between pyridine and benzyl bromide and the SNAr reaction between ethanol and 1-fluoro-2,4-dinitrobenzene.
Correction for ‘Rationalising the effects of ionic liquids on a nucleophilic aromatic substitution reaction’ by Rebecca R. Hawker et al., Org. Biomol. Chem., 2017, 15, 6433–6440.
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