Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4413898 | Chemosphere | 2008 | 7 Pages |
Abstract
The interconversion of the stereoisomers contained in technical 1,2,5,6,9,10-hexabromocyclododecane, a major brominated flame retardant increasingly found in the environment and in biota, was investigated at elevated temperatures. The application of pure enantiomers of the three constituents α-, β-, and γ-HBCD enabled the unambiguous elucidation of the individual isomerisation reactions as well as the quantification of all respective rate constants. At 160 °C the rate constants range over two orders of magnitude from 1.50 × 10−3 to 1.88 × 10−5 mol(%) s−1. A preliminary mechanistic explanation for the differences of the rate constants which govern the composition of HBCD diastereomers at equilibrium is given.
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Robert Köppen, Roland Becker, Christian Jung, Irene Nehls,