Mechanism of the polycondensation of chlorides of aromatic dicarboxylic acids with dihydric phenols View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1969-04

AUTHORS

R. S. Belichkova, V. V. Korshak, S. V. Vinogradova, V. V. Ivanov, A. T. Ponomarenko, N. S. Enikolopyan

ABSTRACT

The kinetics of the polycondensation of terephthalyl chloride with 9,9-bis-(4-hydroxyphenyl)fluorene in ditolylmethane, dinyl, and nitrobenzene was studied in the temperature interval 150–200°.According to the initial rates the reaction is one and a half-order; first-order with respect to the bis-phenol and half-order with respect to the acid chloride.With increasing temperature of the reaction, the electric conductivity of the reaction mixture increases substantially. It-was established that the acid chloride is responsible for this.The total order during the process is lower than the reaction order with respect to the initial rates; this lack of agreement is due to a change in the reactivity of the acid chloride group after replacement of one halogen in the initial acid dichloride.A kinetic scheme of an ionic reaction mechanism with the formation of an acylium ion was proposed, which explains the results obtained. The kinetics of the polycondensation of terephthalyl chloride with 9,9-bis-(4-hydroxyphenyl)fluorene in ditolylmethane, dinyl, and nitrobenzene was studied in the temperature interval 150–200°. According to the initial rates the reaction is one and a half-order; first-order with respect to the bis-phenol and half-order with respect to the acid chloride. With increasing temperature of the reaction, the electric conductivity of the reaction mixture increases substantially. It-was established that the acid chloride is responsible for this. The total order during the process is lower than the reaction order with respect to the initial rates; this lack of agreement is due to a change in the reactivity of the acid chloride group after replacement of one halogen in the initial acid dichloride. A kinetic scheme of an ionic reaction mechanism with the formation of an acylium ion was proposed, which explains the results obtained. More... »

PAGES

781-786

Journal

TITLE

Russian Chemical Bulletin

ISSUE

4

VOLUME

18

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00907042

DOI

http://dx.doi.org/10.1007/bf00907042

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030410198


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