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Title: The LFER correlations for SN2 reactions of phenacyl bromide
Authors: Winston, S John
Rao, P Jayaprakash
Sethuram, B
Rao, T Navaneeth
Issue Date: Nov-1996
Publisher: NISCAIR-CSIR, India
Abstract: The second order rate constants for the reaction of phenacyl bromide with a number of nucleophiles, viz., CO, HCO, OH-, CH3COO-, N3-, SO, phenoxide, imidazole, pyridine, aniline and thiourea have been measured in 60% acetone - 40% water(v/v)solvent medium at different temperatures. The correlation of the rate data with different linear free energy relations (LFER), viz., the Bronsted equation, the Swain-Scott equation and the Edwards equation has been attempted. The applicability of Bronsted equation and Swain-Scott equation has been found to be unsatisfactory and the reasons are discussed. The correlation with Edwards equation has been found to be quite good as evidenced from the multiple regression analysis of the data which yielded the values α = 1.48 and β = 0.439 (R2= 89.7%). The activation parameters for all the reactions have been calculated and presented.
Page(s): 979-982
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.35A(11) [November 1996]

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