Accession Number:

AD0269724

Title:

A STUDY OF THE HALOGENATION OF ALIPHATIC HYDROCARBONS AND DERIVATIVES THEREOF

Descriptive Note:

Corporate Author:

SHEFFIELD UNIV (ENGLAND)

Personal Author(s):

Report Date:

1961-08-01

Pagination or Media Count:

1.0

Abstract:

Fluorination, chlorination and bromination of the 1- and 2-haloalkanes and related compounds were investigated in the gas phase. Fluorination proved to be the least selective process, bromination the most. A substituent halogen accelerates bromination at the C atom to which substituent is attached, but chlorination is slightly and fluorination strongly retarded at this position. All 3 modes of halogenation are retarded at adjacent sites fluorination being relatively most affected, bromination the least. Experiments were carried out over a range of temperatures and indicate that changes in reactivity observed are due principally to changes in activation energy for H abstraction. These results throw light on the factors controlling H abstraction by free radicals. Radicals of the type -CHXCH- where X is a halogen atom are relatively unstable. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE