- Regioselectivity of the acidolysis of 2-(chloromethyl)oxirane with aromatic acids in the presence of organic bases
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Regioselectivity of the reaction of 2-(chloromethyl)oxirane with aromatic acids in the presence of tertiary amines and tetraalkylammonium halides has been studied. Opening of the oxirane ring follows simultaneously SN2 and borderline SN2 mechanisms. The regioselectivity of the acidolysis of substituted oxiranes is determined by acid-base properties of the reactants and catalysts and steric factor. The regioselectivity increases as the contribution of the SN2 mechanism increases.
- Sinel'nikova,Shved
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p. 332 - 336
(2014/06/09)
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- The effect of diglyme on the kinetics of chromium(III) ethanoate-catalyzed reactions of carboxylic acids with epichlorohydrin
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The kinetics of reaction between acetic, acrylic, or methacrylic acid and epichlorohydrin in diglyme solution are studied with chromium(III) ethanoate as catalyst. The reaction has been found to be of first-order with respect to both epichlorohydrin and catalyst and zeroth order with respect to acid. Relative reactivities of the acids in reaction with epichlorohydrin and regioselectivity of the addition in diglyme are compared with those for the systems without solvent.
- Bukowski, Wiktor
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- Reactivity of some carboxylic acids in reactions with some epoxides in the presence chromium (III) ethanoate
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Reactivities have been compared of acetic, acrylic, and methacrylic acid in reactions with epichlorohydrin, phenylglycidyl ether, glycidyl acetate, and glycidyl methacrylate carried in the presence of chromium (III) ethanoate. The acid reactivities changed differently with respect to the oxirane series. The effect of solvents on the reactions of acids with epichlorohydrin has also been observed.
- Bukowska, Agnieszka,Bukowski, Wiktor
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p. 234 - 237
(2013/09/06)
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- CATALYSIS BY POLYMERS.V. SOME KINETIC ASPECTS ON THE POLYMER CATALYZED REACTIONS OF OXIRANES
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The esterification of epichlorhydrin with acrylic acid in the presence of various macro- and micromolecular catalysts has been investigated.The influence of concatenation of the catalytic functional groups on the reaction rate had been studied too.
- Oprea, S.,Dumitriu, E.,Hulea, T.,Hulea, V.
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- KINETICS AND MECHANISM OF AUTOCATALYTIC REACTION OF ACRYLIC ACID WITH EPICHLOROHYDRIN IN PRESENCE OF BASIC CATALYSTS
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The autocatalytic reaction between acrylic acid and epichlorohydrin in presence of pyridine (P), N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO) has been investigated.Rate constants and activation parameters for both autocatalytic reactions in which the catalytic function is fulfilled, besides the basic catalyst, by the substrate: acrylic acid (k1) and by the product: 3-chloro-2-hydroxypropyl acrylate (k2) have been calculated.The first autocatalytic reaction is isokinetic in character; the entropy of activation increases in the series DMSO DMF P.The second autocatalytic reaction is, approximately, isenthalpic and isentropic.The probable structures of active aggregates have also been presented.
- Rokaszewski, Edward,Rut, Jolanta
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p. 1595 - 1605
(2007/10/02)
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