Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 엄익환 | - |
dc.date.accessioned | 2016-08-28T12:08:09Z | - |
dc.date.available | 2016-08-28T12:08:09Z | - |
dc.date.issued | 2008 | - |
dc.identifier.issn | 0253-2964 | - |
dc.identifier.other | OAK-5318 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/220119 | - |
dc.description.abstract | Second-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.language | English | - |
dc.title | A mechanistic study on alkaline hydrolysis of Y-substituted phenyl benzenesulfonates | - |
dc.type | Article | - |
dc.relation.issue | 12 | - |
dc.relation.volume | 29 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.index | KCI | - |
dc.relation.startpage | 2477 | - |
dc.relation.lastpage | 2481 | - |
dc.relation.journaltitle | Bulletin of the Korean Chemical Society | - |
dc.identifier.wosid | WOS:000262397500034 | - |
dc.identifier.scopusid | 2-s2.0-60149102593 | - |
dc.author.google | Im L.-R. | - |
dc.author.google | Park Y.-M. | - |
dc.author.google | Um I.-H. | - |
dc.contributor.scopusid | 엄익환(7006725706;6506759437) | - |
dc.date.modifydate | 20230411105538 | - |