35487-17-3Relevant articles and documents
IONIC LIQUIDS, THE METHOD FOR PREPARING THE SAME AND METHOD FOR REMOVING ACETYLENES FROM OLEFIN MIXTURES USING THE IONIC LIQUIDS
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Page/Page column 4, (2012/04/11)
There are provided an ionic liquid having ether group(s) in which a copper(I) compound is included, a method for preparing the same, and a method for removing traces amounts of acetylene-based hydrocarbon compounds included in olefin by absorption or extraction using the same. When the disclosed solution is used, oxidation of Cu(I) to Cu(II) is prevented since CuX is stabilized by the ionic liquid. Thus, selective removal efficiency of acetylenic compounds is improved greatly while the removal performance is retained for a long period of time. Further, since the solution according to the present disclosure is applicable as an extractant as well as an absorbent, the associated operation is simple and apparatus cost can be decreased.
KINETICS OF THE PHENOLYSIS OF ACID CHLORIDES IN A PROTON-INERT MEDIUM. NUCLEOPHILIC CATALYSIS BY TERTIARY AMINES
Simanenko, Yu. S.,Savelova, V. A.,Litvinenko, L. M.,Belousova, I. A.,Dadali, V. A.,Zubareva, T. M.
, p. 123 - 131 (2007/10/02)
The kinetics of the reactions of ArOH with acid chlorides (AcX), catalyzed by tertiary amines (B), were studied by UV spectroscopy in methylene chloride (25 deg C): 1) Benzoyl chloride with β-naphthol (B = N-methylimidazole); 2) benzenesulfonyl chloride with p-phenylazophenol (B = 4-dimethylaminopyridine) with the following concentrations 0 >/= 0 >> 0.A nucleophilic mechanism of catalysis with rapid and equilibrium accumulation of the intermediate products, i.e., N-benzoyl-3-methylaminoimidazolium (Ia) and N-phenylsulfonyl-4-dimethylaminopyridinium (Ib) chlorides, is realized in the case of reactions (1) and (2).In the slow stage the intermediates (I) transfer the acyl group not to the free ArOH but to the hydrogen-bonded complexes of ArOH with (I) and with the amines (B), the formation constants of which were determined independently.One of the above-mentioned paths represents the "intramolecular" transfer of the acyl group in the associate ArOH...(I), whereas the second represents bimolecular attack by the intermediate (I) on the complex ArOH...B.In view of the complexing effects an equation was derived for the phenolysis rate which makes it possible to calculate the rate constants for transfer of the acyl group.Thus, the motivating force of the reactions (1) and (2) in the proton-inert medium is proton transfer even in the initial state, while nucleophilic catalysis is realized exclusively in conjunction with general-base assistance on the part of the anion of the intermediate (I) ("intramolecular" catalysis) or on the part of the free base B (intermolecular catalysis) to the transfer of the proton from ArOH in the rate-controlling stage.