N-Aminoalkylbenzamides and N-aminoalkyl-o-methoxybenzamides have been prepared and examined for their pK_a, log P and dopamine receptor affinity. The pK_a values range from ca. 7.5 for the derivatives having a one-C-atom side-chain, to ca. 10.3 for the N-aminobutyl derivatives. These variations with chain length are satisfactoryly explained by a field model. The variations in (log P)-values as a function of chain length and substitution at the N-atom indicate the involvement of proximity and conformational effects. The complete inability of the compounds to displace ³H-spiperone and ³H-sulpiride from their specific rat striatal binding sites demonstrates the critical role of adequate aromatic substitution at positions 4 and 5.