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Kinetic Study on Reactions of O- Y-substituted Phenyl Thionobenzoates with Quinuclidine: Factors Governing Reactivity and Reaction Mechanism.
- Source :
-
Bulletin of the Korean Chemical Society . Apr2015, Vol. 36 Issue 4, p1120-1125. 6p. - Publication Year :
- 2015
-
Abstract
- Second-order rate constants ( kquin) for the reactions of O- Y-substituted phenyl thionobenzoates ( 3a-3i) with quinuclidine have been measured spectrophotometrically. Comparison of kquin with the rate constants reported previously for the corresponding reactions with benzylamine ( kBzNH2) has revealed that quinuclidine is less reactive than benzylamine toward 3a-3i although the former is 2.1 p Ka units more basic than the latter. Steric hindrance exerted by quinuclidine has been suggested to be responsible for the decreased reactivity of the tertiary amine. The Brønsted-type plot for the reactions of 3a-3i with quinuclidine is linear with βlg = −0.37. The Hammett plot correlated with [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02532964
- Volume :
- 36
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Bulletin of the Korean Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 103345382
- Full Text :
- https://doi.org/10.1002/bkcs.10207