The interaction between toluene and cyclohexane is primarily due to van der Waals forces. Both toluene and cyclohexane are nonpolar molecules, so the main interaction between them is London dispersion forces. These forces occur due to temporary fluctuations in electron density, causing transient dipoles that induce dipoles in nearby molecules. The larger the molecules, the stronger the dispersion forces, so the interaction between toluene and cyclohexane is relatively strong.
