The electron donor-acceptor abilities of some cyclic ethers ( tetrahydropyran or tetrahydrofuran), benzene, and halobenzenes ( fluorobenzene or chlorobenzene) and the molecular interactions between these compounds have been investigated through a wide set of thermodynamic mixing properties of their mixtures. The mixing properties have been derived from experimental measurements of density, speed of sound, refractive index, surface tension, heat of mixing, and vapor-liquid equilibrium at the temperature of 298.15 K