Diffusion coefficients of 2-bromoanisole at infinite dilution in supercritical carbon dioxide has been evaluated by Taylor-Aris chromatographic technique. 2-Bromoanisole was used in the synthesis of unsymmetrically substituted biphenyl compounds. Diffusion coefficients of 2-bromoanisole at infinite dilution in supercritical carbon dioxide has been evaluated by Taylor-Aris chromatographic technique. 2-Bromoanisole was used in the synthesis of unsymmetrically substituted biphenyl compounds.