Intricate kinetics: in situ FTIR-spectroscopy discloses a phase change during ionic liquid synthesis. Issue 27 (30th June 2017)

• Record Type: Journal Article
• Authors: Ohligschläger, A.; Liauw, M. A.
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 27(2017)
• Page Start: 18018
• Page End: 18022
• Publication Date: 2017-06-30
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp03257a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Autocatalytic behaviour is found in a Menshutkin-like IL synthesis using in situ -ATR-IR-spectroscopy. A sudden change in the reaction rate progress indicates a microscopic phase separation. Abstract : The kinetics of the methylation of triethylamine (NEt3 ) with dimethyl carbonate (DMC) in methanol have been investigated by means of in situ ATR-IR-spectroscopy. The data show an autocatalytic influence of the ionic product on reaction kinetics. A bend in the reaction rate progress indicates a sudden change from solvated ions to a microstructured biphasic system, which is reflected in the dependence of the reaction rate constant on the product concentration and the Hildebrand parameter.