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dc.contributor.author엄익환-
dc.date.accessioned2016-08-28T10:08:38Z-
dc.date.available2016-08-28T10:08:38Z-
dc.date.issued2013-
dc.identifier.issn0253-2964-
dc.identifier.otherOAK-9882-
dc.identifier.urihttp://dspace.ewha.ac.kr/handle/2015.oak/223541-
dc.description.abstractThe second-order rate constants have been measured spectrophotometrically for the reactions of paraoxon 1 and parathion 2 with a series of alicyclic secondary amines, OH- and HOO- ions in H2O at 25.0 ± 0.1 °C. A linear Brønsted-type plot with βnuc = 0.40 was obtained for the reactions of 1 with amines and OH-. The reaction has been concluded to proceed through a concerted mechanism. HOO- deviates positively from the linear Brønsted-type plot, implying that the α-effect is operative. The magnitude of the α-effect (kHOO-/kOH-) was found to be ca. 55 for the reaction of 1 and 290 for that of parathion 2, indicating that HOO- is highly effective in decomposition of the toxic phosphorus compounds although it is over 4 pKa units less basic than OH-. Among the theories suggested as origins of the α-effect (e.g., TS stabilization through an intramolecular Hbonding interaction, solvent effect, and polarizability effect), polarizability effect appears to be the most important factor for the α-effect in this study, since the polarizable HOO- exhibits a larger α-effect for the reaction of the more polarizable substrate 2.-
dc.languageEnglish-
dc.titleDecomposition of paraoxon and parathion by amines, HOO- and oh- Ions: Reaction mechanism and origin of the α-Effect-
dc.typeArticle-
dc.relation.issue1-
dc.relation.volume34-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.indexKCI-
dc.relation.startpage201-
dc.relation.lastpage206-
dc.relation.journaltitleBulletin of the Korean Chemical Society-
dc.identifier.doi10.5012/bkcs.2013.34.1.201-
dc.identifier.wosidWOS:000316430100036-
dc.identifier.scopusid2-s2.0-84872926466-
dc.author.googleBae A.-R.-
dc.author.googleLee J.-
dc.author.googleUm I.-H.-
dc.contributor.scopusid엄익환(7006725706;6506759437)-
dc.date.modifydate20180104081001-
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자연과학대학 > 화학·나노과학전공 > Journal papers
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