Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 엄익환 | - |
dc.date.accessioned | 2016-08-28T12:08:00Z | - |
dc.date.available | 2016-08-28T12:08:00Z | - |
dc.date.issued | 2010 | - |
dc.identifier.issn | 0253-2964 | - |
dc.identifier.other | OAK-6409 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/220650 | - |
dc.description.abstract | Second-order rate constants (kCN-) have been measured for nucleophilic substitution reactions of Y-substituted phenyl benzoates (1a-r) with CN- ion in 80 mol % H2O/20 mol % DMSO at 25.0 ± 0.1 °C. The Brønsted-type plot is linear with βlg = -0.49, a typical βlg value for reactions reported to proceed through a concerted mechanism. Hammett plots correlated with σo and σ-constants exhibit many scattered points. In contrast, the Yukawa-Tsuno plot for the same reaction exhibits excellent linearity with pY = 1.37 and r = 0.34, indicating that a negative charge develops partially on the oxygen atom of the leaving aryloxide in the rate-determining step (RDS). Although two different mechanisms are plausible (i.e., a concerted mechanism and a stepwise pathway in which expulsion of the leaving group occurs at the RDS), the reaction has been concluded to proceed through a concerted mechanism on the basis of the magnitude of βlg and pY values. | - |
dc.language | English | - |
dc.title | Kinetics and mechanism of nucleophilic displacement reactions of Y-substituted phenyl benzoates with cyanide Ion | - |
dc.type | Article | - |
dc.relation.issue | 3 | - |
dc.relation.volume | 31 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.index | KCI | - |
dc.relation.startpage | 689 | - |
dc.relation.lastpage | 693 | - |
dc.relation.journaltitle | Bulletin of the Korean Chemical Society | - |
dc.identifier.doi | 10.5012/bkcs.2010.31.03.689 | - |
dc.identifier.wosid | WOS:000276083800036 | - |
dc.identifier.scopusid | 2-s2.0-77951838891 | - |
dc.author.google | Kim S.-I. | - |
dc.author.google | Kim E.-H. | - |
dc.author.google | Um I.-H. | - |
dc.contributor.scopusid | 엄익환(7006725706;6506759437) | - |
dc.date.modifydate | 20230411105538 | - |