This procedure has revealed that for some contacts Dmax significantly deviate from the sum of the atomic type specific RvdW (Table ). We identify several scenarios leading to such deviations: (1) the interacting atoms are not in a state typical for common organic compounds or (2) are sterically hindered, (3) the contact corresponds to the obviously specific interaction (e.g. hydrogen or halogen bond), and (4) its Dmax values does not strongly depend on the contact geometry. We did not use these contacts to determine RvdW as our final goal was to obtain RvdW corresponding to weak nonspecific interactions that were not affected by secondary effects. For example, tetra-coordinated B, P and As atoms were not considered due to steric hindrance, and Nsp/Nsp2/Ssp2 due to significant dependence of Dmax on the contact geometry. The contacts used for RvdW determination are marked with '+' sign in the second column of Table . The RvdW values determined using this procedure (Rmax) are listed in Table and compared with the respective values from the most popular vdW radii sets (Rhalf).