We aim at obtaining reliable structural information for selected compounds from a series of four 9-methyltripticene derivatives. These compounds form in the solid state interesting intra- and intermolecular C-H...Acceptor hydrogen bonds. Structural information obtained from neutron diffraction (in particular positions and ADPs of hydrogen atoms) will later be used to perform combined high resolution neutron and X-ray diffraction charge density studies for these compounds. As a result we expect quantitative experimental electron density distributions to get details of C-H...Acceptor hydrogen bonds. We will then perform topological analysis of electron densities and finally will correlate experimental critical point (and integrated) properties of charge densities with 1J(C,H) couplings to the individual protons (and other parameters) obtained from NMR.