A STUDY OF THE HALOGENATION OF ALIPHATIC HYDROCARBONS AND DERIVATIVES THEREOF
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1961
- Accession Number
- AD0269724
Entities
People
- J.m. Tedder
- P.s. Fredericks
Organizations
- University of Sheffield