Measurements of infinite dilution binary diffusion coefficients of acetylferrocene and 1,1’-diacetylferrocene in supercritical carbon dioxide and in liquid organic solvents

•Measurements of diffusion coefficients for ferrocenes in supercritical CO2.•Almost same D12 values for acetylferrocene and 1,1′-diacetylferrocene.•Accurate prediction of all D12 data by hydrodynamic equation.•Accurate correlation of retention factors with CO2 density and temperature.