The refractive indices, n D , and relative permittivities, , have been measured for the binary liquid mixtures of γ-butyrolactone, γ-valerolactone, δ-valerolactone, or -caprolactone + benzene, + toluene, or + ethylbenzene over the whole composition range at 293.15 K and 313.15 K and atmospheric pressure. For the pure lactones the dipole moments, µ, the molar polarizability, P M , and the molar refractivity, R M , were determined. From the values of and n D of the lactone + benzene mixtures, the Kirkwood correlation factor, g, was calculated indicative of the structures of the mixtures.

The adsorbate formed after adsorption of cyclohexene on Pt(110) and polycrystalline Pt electrodes is displaced by competitive adsorption of UPD copper. Since it desorbs as benzene, cyclohexene is dehydrogenated during adsorption. After adsorption of ethene on polycrystalline Pt, only 10% of the adsorbate are displaced by Cu, leaving the surface as ethene. This corresponds to weakly adsorbed species, probably π-bound ethene.