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Başlık: Determination of steric effect on the esterification of different alcohols with propanoic acid over cation-exchange resin catalyst Dowex 50Wx4
Yazarlar: Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Anabilim Dalı.
Erdem, Beyhan
Cebe, Mustafa
AAI-1238-2021
14023997200
6506210722
Anahtar kelimeler: Chemistry
Propanoic acid
Esterification
Taft relationship
Steric effect
Heterogeneous catalyst
Acetic-acid
Propionic-acid
Kinetics
Hydrogenation
Isobutanol
Hydrolysis
Ethanol
Catalysts
Equilibrium constants
Esterification
Esters
Ion exchange resins
Rate constants
Saturated fatty acids
Cation exchange resins
Heterogeneous catalyst
N-propyl
Propanoic acid
Rate equations
Second-order models
Steric effect
Taft relationship
Propionic acid
Yayın Tarihi: 2011
Yayıncı: Walter De Gruyter Gmbh
Atıf: Erdem, B. vd. (2011). "Determination of steric effect on the esterification of different alcohols with propanoic acid over cation-exchange resin catalyst Dowex 50Wx4". Zeitschrift fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 225(1), 125-136.
Özet: This paper describes the application of LFER in the form of Taft correlation to understand the mechanism of the esterification of propanoic acid with different alcohols over heterogeneous catalyst, Dowex 50Wx4. The rate constant (k(1)) in the rate equation decreases with change of alcohols in the order methanol, ethanol, n-propyl, n-butyl, n-pentyl, iso-butyl, iso-propyl and sec-butyl (2-buthanol). The reaction of propanoic acid with alcohols fits the Taft equation, log k(1)/k(CH3) = 1.0061 E-s - 0.0012, which implies that the steric effect of the substituent governs that reaction and the mechanism is similar between the different alcohols. The experimental results were modelled according to a simple second-order model. It was found that the equilibrium constant of this reaction does not depend on the structure of the organic alcohols, and has for 333 K the value 4.04.
URI: https://doi.org/10.1524/zpch.2011.6153
https://www.degruyter.com/document/doi/10.1524/zpch.2011.6153/html
http://hdl.handle.net/11452/24518
ISSN: 0942-9352
Koleksiyonlarda Görünür:Scopus
Web of Science

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