Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 엄익환 | - |
dc.date.accessioned | 2016-08-28T10:08:21Z | - |
dc.date.available | 2016-08-28T10:08:21Z | - |
dc.date.issued | 2013 | - |
dc.identifier.issn | 0253-2964 | - |
dc.identifier.other | OAK-10344 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/223944 | - |
dc.description.abstract | The second-order rate constants (kOH-) for the reactions of Y-substituted-phenyl diphenylphosphinates (4a-4i) with OH- in H 2O at 25.0 ± 0.1 °C have been measured spectrophotometrically. Comparison of kOH- with kEtO- (the second-order rate constants for the corresponding reactions with E tO- in ethanol) has revealed that EtO- is less reactive than OH- although the former is ca. 3.4 pKa units more basic than the latter, indicating that the reactivity of these nucleophiles is not governed by their basicity alone. The Brønsted-type plot for the reactions of 4a-4i with OH- is linear with βlg = -0.36. The Hammett plot correlated with σ- constants results in a slightly better correlation than that correlated with σo constants but exhibits many scattered points. In contrast, the Yukawa-Tsuno plot for the same reactions exhibits an excellent linear correlation with ρ = 0.95 and r = 0.55. The r value of 0.55 implies that a negative charge develops partially on the O atom of the leaving group. Thus, the reactions of 4a-4i with OH- have been concluded to proceed through a concerted mechanism. Copyright © 2005 KCSNET. | - |
dc.language | English | - |
dc.title | Kinetics and reaction mechanism for alkaline hydrolysis of Y-substituted-phenyl diphenylphosphinates | - |
dc.type | Article | - |
dc.relation.issue | 7 | - |
dc.relation.volume | 34 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.index | KCI | - |
dc.relation.startpage | 2001 | - |
dc.relation.lastpage | 2005 | - |
dc.relation.journaltitle | Bulletin of the Korean Chemical Society | - |
dc.identifier.doi | 10.5012/bkcs.2013.34.7.2001 | - |
dc.identifier.wosid | WOS:000322612400013 | - |
dc.identifier.scopusid | 2-s2.0-84881403691 | - |
dc.author.google | Hong H.-J. | - |
dc.author.google | Lee J. | - |
dc.author.google | Bae A.R. | - |
dc.author.google | Um I.-H. | - |
dc.contributor.scopusid | 엄익환(7006725706;6506759437) | - |
dc.date.modifydate | 20230411105538 | - |