View : 286 Download: 0

Full metadata record

DC Field Value Language
dc.contributor.author엄익환-
dc.date.accessioned2016-08-28T10:08:21Z-
dc.date.available2016-08-28T10:08:21Z-
dc.date.issued2013-
dc.identifier.issn0253-2964-
dc.identifier.otherOAK-10344-
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/223944-
dc.description.abstractThe 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.languageEnglish-
dc.titleKinetics and reaction mechanism for alkaline hydrolysis of Y-substituted-phenyl diphenylphosphinates-
dc.typeArticle-
dc.relation.issue7-
dc.relation.volume34-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.indexKCI-
dc.relation.startpage2001-
dc.relation.lastpage2005-
dc.relation.journaltitleBulletin of the Korean Chemical Society-
dc.identifier.doi10.5012/bkcs.2013.34.7.2001-
dc.identifier.wosidWOS:000322612400013-
dc.identifier.scopusid2-s2.0-84881403691-
dc.author.googleHong H.-J.-
dc.author.googleLee J.-
dc.author.googleBae A.R.-
dc.author.googleUm I.-H.-
dc.contributor.scopusid엄익환(7006725706;6506759437)-
dc.date.modifydate20180104081001-
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

BROWSE