Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/97755
Type: Artigo de periódico
Title: The Sn Mechanism In Aromatic Compounds. Part 41.1 Thermochemical Calculations And Experimental Measurements Of Methanolysis Of 1-fluoro-2,4-dinitrobenzene, Picryl Chloride, And Picryl Fluoride
Author: Lam K.-B.
Miller J.
Moran P.J.S.
Abstract: Rates and Arrhenius parameters for methanolysis of 1-fluoro-2,4- dinitrobenzene, picryl chloride, and picryl fluoride have been determined, and shown to be in satisfactory agreement with the results of a fundamental method of thermochemical calculation successfully applied previously to a wide range of SNAr reactions. These calculations also shed light on the sources of the large difference in nucleophilic strength of OMe- and MeOH. selected for the comparison of anionic and neutral forms of a nucleophile. The experimental results also lead to a comparison of the leaving group mobility of F and Cl in reactions with MeOH as nucleophile : as well as the activating power of an o-NO2 group, when there is an NO2 group in the other ortho-position. In the reaction of picryl chloride, the secondary reaction between product chloride ion and picryl methyl ether (demethylation) was avoided by carrying out the reaction in the presence of silver ion.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-37049100435&partnerID=40&md5=e7829d178adb047acdf54136a584d828
Date Issue: 1977
Appears in Collections:Unicamp - Artigos e Outros Documentos

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