This proposal aims to investigate the dynamics of ortho-/meta-/para- xylene, mesitylene and 1,3,5- Trihydroxybenzene. Improved understanding of their dynamics is relevant to these industrial processes. Previous beamtime using QENS (1610076, 1620133 and 1710298) have investigated the dynamics of benzene, toluene and ethylbenzene, respectively. This proposal would complete the range of aromatics and provide for a full comparison of the effect of the addition of methyl groups to benzene. A full knowledge of the diffusion properties of the liquids would greatly enhance our understanding of the dynamics of these aromatic molecules in both the pure liquid as well as provide the basis for examining their behavior in porous materials, for example heterogeneous catalysts.