Abstract
Electrophilic bromination is shown to be a useful reaction for the site-specific bromination of phenyl ethers containing from two to seven benzene rings. Compared to the phenyl ether stationary phases used in gas chromatography, bromination primarily raises the lower and upper operating temperatures, generally leads to a reduction in the efficiency of column packings and changes the selectivity and polarity of the phases only to a small extent. The three-ring bromophenyl ether, 1,3-dibromo-4,6-bis(4-bromophenoxy)benzene is shown to have the most useful stationary phase properties for the separation of organic compounds with a useable temperature range of 80–200°C.
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