Polar effects in hydrogen abstraction from benzaldehydes—I

Document Type

Article

Publication Date

1-1-1968

Abstract

The relative rates of hydrogen abstraction by the trichloromethyl radical have been determined for nine m- and p-substituted benzaldehydes by means of competitive reactions using ethylbenzene as referecne standard. A polar effect ρ{variant} = 0·74) was shown to be correlated by the Hammett equation with the σ constant, and the anomalous behaviour of the p-MeO and p-PhO substituents is discussed. The deuterium isotope effect KH/KD was found to be 2·4 at 80°. © 1968.

Keywords

Polar effects, hydrogen abstraction, benzaldehydes-I., trichloromethyl radical

Publication Title

Tetrahedron

ISSN

0040-4020

Divisions

CHEMISTRY

Volume

24

Issue

13

Publisher

Elsevier

Additional Information

Lee, K.H. Dept. of Chemistry, University of Malaya, Malaysia.

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