Palladium acetylacetonate dissolved in 1-n-butyl-3-methylimidazolium tetrafluoroborate ionic liquid catalyses the selective two-phase hydrogenation of conjugated and non-conjugated (functionalized and non-functionalized) dienes into the respective monoenes. The system does not require the use of organic solvents, the products are removed by simple ...
Ionic liquids, especially those based on the 1,3-dialkylimidazolium cation, with a large range of liquid phase, negligible vapour pressure, low viscosity and high thermal and chemical stability are emerging as a new class of `green' solvents for extraction and separation processes, organic synthesis and catalysis. The main milestones reached in the...
This work describes the development of a two phase hydroaminomethylation process of olefines. The research concentrates on the following three biphasic systems: organic phase/water, toluene/triethylenglykol and organic phase/ionic liquids. Especially using the biphasic system organic phase/ionic liquid results in an easy reaction between olefines a...
Published in Topics in Catalysis
Two different possibilities for the preparation of immobilised ionic liquids are presented. Lewis acidic ionic liquids which have been shown to be highly active catalysts in alkylation reactions of the Friedel–Crafts type were supported on amorphous silica and MCM 41 materials. We describe the different methods used, as well as analytical data and ...
Published in Catalysis Letters
The combination of 1-n-butyl-3-methylimidazolium chloride with ZnCl2 affords ionic mixtures with different melting point temperatures depending on the zinc molar fraction. RuCl2(PPh3)3 immobilised in the low melting mixture (60 °C) promotes the 1-hexene hydrogenation (turnover frequencies up to 44 min−1) and the recovered solid catalyst phase can b...
Published in Biotechnology Letters
Four different ionic liquids, based on dialkylimidazolium cations associated with perfluorinated and bis(trifluoromethyl)sulfonyl amide anions were used as reaction media for butyl butyrate synthesis catalyzed by free Candida antarctica lipase B at 2% (v/v) water content and 50 °C. Lipase had enhanced synthetic activity in all ionic liquids in comp...
Published in Journal of Applied Electrochemistry
The redox behaviour of copper species in an 'ammonium imide' room temperature molten salt was examined to clarify the applicability of the salt to the electroplating media of various metals. Trimethyl-n-hexylammonium bis((trifluoromethyl)sulfonyl)amide (TMHA-Tf2N), having an electrochemical window of 5.6 V (50 °C), and the corresponding copper(II);...
Published in Catalysis Letters
Rh(acetylacetonate)(CO)2/sulfonated-Xantphos dissolved in pure 1-n-butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyses the hydroformylation of heavy olefins (C8–C12) with selectivities (up to 99% in n-aldehydes). The selectivity is strongly influenced by the nature of the ionic phase and co-solvent.
Ionic liquids, in specially those based on the 1,3-dialkylimidazolium cation, have been receiving special attention in differents areas due to their interesting physical-chemical properties. In this work, some aspects of their structure (in both solid and liquid state) and its relationships with their properties are reviewed.
