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|Type:||Artigo de periódico|
|Title:||The Reactivity Of Some Primary Amines In Sn2ar Reactions With 2- And 4-chloro-1-methylpyridinium Ions|
|Author:||Souza Brenelli E.C.|
Samenho Moran P.J.
|Abstract:||Rate constants for the SN2Ar reactions of 2- and 4-chloro-1-methylpyridinium ions with butylamine, glycine, glycylglycine, and ethylenediamine monohydrochloride, in water at 1.0 mol dm-3 constant ionic strength and 25 °C have been determined. For all amines studied k obs is found to be related to free-amine concentration, [A], as kobs = k0 + k1[A]. The 2-isomer was always more reactive than the 4-isomer. The Brønsted β coefficients are 0.66 for the 2-isomer and 0.49 for the 4-isomer. These reactions seem to be charge-controlled. From the derived Edwards-equation results one could infer that the 2-isomer might tend to interact by way of its charge more than the 4-isomer.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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