Some studies on the solvolysis of 1-chloro-1-alkyl cycloalkanes

Author:

Ranganayakulu K.,Devi M. Vasumathi,Rao R. Balaji,Rajeswari K.

Abstract

The effect of the bulk of the sidechain on the rate of solvolysis of 1-alkyl cyclopentyl, cyclohexyl, and cycloheptyl chlorides has been studied. With the exception of the t-butyl systems, the ratio of solvolysis rates for the three ring systems falls in a given series. The slower rate of solvolysis in the six-membered ring system may be due to an extra activation energy contribution caused by the conversion of a neutral chair form to the twist boat or half chair conformation, prior to the actual solvolysis. In the case of five- and seven-membered ring systems the formation of an intermediate carbonium ion is sterically favoured (I-strain or eclipsing interaction) consistent with earlier findings. The faster rate of solvolysis of 1-t-butylcycloalkyl chlorides is likely due to a rearrangement reaction where alkyl participation enhances the rate of solvolysis.

Publisher

Canadian Science Publishing

Subject

Organic Chemistry,General Chemistry,Catalysis

Cited by 9 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Kinetics and Mechanism of Unimolecular Heterolysis of Framework Compounds: XVII. Solvation Effects in Dehydrobromination of tert-Butyl Bromide, 1-Bromo-1-Methylcyclohexane, and 2-Bromo-2-methyladamantane in Dipolar Aprotic Solvents;Russian Journal of Organic Chemistry;2005-11

2. Kinetics and Mechanism of Monomolecular Heterolysis of Commercial Organohalogen Compounds: XXXVII.1Effect of Nucleofuge and Solvent of the Relative Rates of Heterolysis of 1-Halo-1-methylcyclopentanes and 1-Halo-1-methylcyclohexanes. Correlation Analysis of Solvation Effects;Russian Journal of General Chemistry;2003-09

3. Kinetics and mechanism of monomolecular heterolysis of commercial organohalogen compounds: XXXVI. Solvent effect on the activation parameters of heterolysis of 1-methyl-1-chlorocyclohexane. Correlation analysis of solvation effects in heterolysis of 1-methyl-1-chlorocyclohexane and 1-methyl-1-chlorocyclopentane;Russian Journal of General Chemistry;2003

4. Kinetics and mechanism of monomolecular heterolysis of commercial organohalogen compounds: XXXIV. Solvent effect on the heterolysis rate of 1-chloro-1-methylcyclohexane. Correlation analysis of solvation effects in heterolysis of 1-chloro-1-methylcyclohexane and 1-chloro-1-methylcyclopentane;Russian Journal of General Chemistry;2003

5. Kinetics and mechanism of monomolecular heterolysis of commercial organohalogen compounds: XXXIII. Correlation analysis of solvation effects in monomolecular heterolysis of 1-bromo-1-methylcyclopentane, 1-bromo-1-methylcyclohexane, and 2-bromo-2-methyladamantane;Russian Journal of General Chemistry;2003

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