Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Infinite dilution binary diffusion coefficients, D12, of ferrocene, 1,1-dimethylferrocene and ethylferrocene in hexane, cyclohexane and ethanol at 313.2 K and pressures from 0.2 to 19 MPa, in acetonitrile at 298.2 to 333.2 K and 0.2 MPa, and various metallic acetylacetonate, acac, complexes such as Co(acac)3, Ru(acac)3, Rh(acac)3, Pd(acac)2 and Pt(acac)2 mainly in ethanol at 313.2 K and 0.2 MPa were measured by the Taylor dispersion method. The D12 values in m2 s-1 for the three ferrocenes in the present study and those of ferrocene and 1,1-dimethylferrocene in supercritical carbon dioxide in our previous studies were represented by a modified hydrodynamic equation over a wide range of viscosity, shown in the paper, with average absolute relative deviation of 2.40 % for 316 data points. Although the D12 values for the acac complexes were roughly represented by the hydrodynamic equation shown in the paper, the accuracies were lower because they were dependent on not solute molecular weight but the number of acac ligand in the complex molecules.