ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 29, Number 1
JKCSEZ 29(1)
February 20, 1985 

Kinetic studies of nucleophilic substitution reaction of substituted benzoyl cyanides and benzoyl chlorides with pyridines were conducted at 25℃ in pure acetone solvent. Results showed that (ⅰ) magnitudes of ρS, ρN and β associated with a change of substituent in the nucleophile indicate relatively advanced bond-formation in the transition state, (ⅱ) the potential energy surface model is able to predict the reaction mechanism, but it is unable to predict the transition state variation to a more product-like transition state, where bond-formation is much more progressed than bond breaking, upon changing the leaving group to that with better leaving ability (ⅲ) the quantum mechanical model predicted the product-like transition state and slightly better leaving ability of CN- as compared with Cl-.