Anion nucleophilicity in ionic liquids: a comparison with traditional molecular solvents of different polarity
摘要:
The nucleophilic reactivity of a homogeneous series of anions (halides, pseudohalides and organic anions) in the ionic liquids [hexmim] [ClO4] and [hexmim] [PF6] has been measured in their reaction with n-alkyl methanesulfonates, and compared with that found in traditional molecular solvents of different polarity, that is, chlorobenzene, DMSO, and MeOH. (c) 2005 Elsevier Ltd. All rights reserved.
Thermodynamic and molecular origin of interfacial rate enhancements and endo-selectivities of a Diels–Alder reaction
作者:Vijay Beniwal、Anil Kumar
DOI:10.1039/c6cp07405g
日期:——
Diels–Alder reaction between cyclopentadiene and methyl acrylate at ionic liquid/n-hexane interfaces. This study describes, for the first time, a methodology for the calculation of the activation parameters of an interfacial reaction. It has been seen that the energy of activation for an interfacial reaction is much smaller than that of the corresponding homogeneous reaction, resulting into the large rate acceleration
benzene sulfonic acid sodiumsalt) using the ionic liquids as replacement solvents for the reaction. The advantage of using ionic liquids as substitutes for organic solvents includes: recyclable/reclaimable solvents, stabilization of intermediates and higher product yields. The 1-hexyl-3-methylimidazolium derivatives can be used for syntheses conducted at low temperatures and are less toxic than typical