Probing the importance of ionic liquid structure: a general ionic liquid effect on an SNAr process
作者:Eden E. L. Tanner、Rebecca R. Hawker、Hon Man Yau、Anna K. Croft、Jason B. Harper
DOI:10.1039/c3ob41634h
日期:——
The effect of a range of ionic liquids, with systematic variations in the cation and anion, on the rate constant of an aromatic substitution process was investigated. Temperature-dependent kinetic data allowed calculation of activation parameters for the process in each solvent. These data demonstrate a generalised ionic liquid effect, with an increase in rate constant observed in each ionic solvent, though the microscopic origins of the rate constant enhancement differ with the nature of the ionic liquid.
Does the cation really matter? The effect of modifying an ionic liquid cation on an SN2 process
作者:Eden E. L. Tanner、Hon Man Yau、Rebecca R. Hawker、Anna K. Croft、Jason B. Harper
DOI:10.1039/c3ob41038b
日期:——
The rate of reaction of a Menschutkin process in a range of ionic liquids with different cations was investigated, with temperature-dependent kinetic data giving access to activation parameters for the process in each solvent. These data, along with molecular dynamics simulations, demonstrate the importance of accessibility of the charged centre on the cation and that the key interactions are of a generalised electrostatic nature.