Tris(acetylacetonate)M(III) complexes, where M = AI, V, Cr, Mn, Fe, Co and Ga, form inclusion compounds with different solvent molecules. The compounds have a host/guest ratio of 1:2 for the small guest molecules CHCl3 and CH2Cl2 and of 1:1 for the slightly bigger guest molecules trans-CHCl=CHCl, CH2ClCH2Cl and CCl4. The 35Cl nuclear quadrupole resonance spectra of these clathrates have been measured in the temperature range 4–200 K. The site symmetry, the existence of different crystal phases, the molecular disorder and molecular motions of the guest molecules in the host cavities, and the host-guest interactions, were evaluated from the NQR frequency measurements. The crystal structures of the M(AcAc)3/trans-CHCl=CHCl compounds were measured at room temperature and confirm the NQR results.