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dc.contributor.author엄익환-
dc.date.accessioned2016-08-28T12:08:09Z-
dc.date.available2016-08-28T12:08:09Z-
dc.date.issued2008-
dc.identifier.issn0253-2964-
dc.identifier.otherOAK-5318-
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/220119-
dc.description.abstractSecond-order rate constants (kOH -) have been measured spectrophotometrically for reactions of Y-substituted phenyl benzenesulfonates (1a-h) with OH- in H2O containing 20 mol % DMSO at 25.0 ± 0.1 °C. The Brønsted-type plot is linear with βlg = -0.55 including the points for the reactions of 2,4-dinitrophenyl benzenesulfonate (1a) and 4-chloro-2-nitrophenyl benzenesulfonate (1c), indicating that the ortho-nitro group on the leaving aryloxide does not exert steric hindrance in the current reactions. The Hammett plot correlated with σ° constants exhibits highly scattered points, while the Hammett correlation with σ- constants results in a slightly better correlation but still many points deviate from the linearity. In contrast, the Yukawa-Tsuno plot shows an excellent linear correlation with r = 0.52, implying that leaving-group departure occurs at the RDS either in a stepwise mechanism or in a concerted pathway. However, the stepwise mechanism in which the leaving group departs in the RDS is excluded since the incoming OH- is much more basic and a poorer nucleofuge than the leaving aryloxide. Thus, the alkaline hydrolysis of 1a-h has been concluded to proceed through a concerted mechanism.-
dc.languageEnglish-
dc.titleA mechanistic study on alkaline hydrolysis of Y-substituted phenyl benzenesulfonates-
dc.typeArticle-
dc.relation.issue12-
dc.relation.volume29-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.indexKCI-
dc.relation.startpage2477-
dc.relation.lastpage2481-
dc.relation.journaltitleBulletin of the Korean Chemical Society-
dc.identifier.wosidWOS:000262397500034-
dc.identifier.scopusid2-s2.0-60149102593-
dc.author.googleIm L.-R.-
dc.author.googlePark Y.-M.-
dc.author.googleUm I.-H.-
dc.contributor.scopusid엄익환(7006725706;6506759437)-
dc.date.modifydate20230411105538-
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자연과학대학 > 화학·나노과학전공 > Journal papers
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