We report the X-ray crystal structure of 11 molecular clips and analyze the influence of substituents ( e. g., OMe, Me, and NO2) and their location on the observed crystal packing. Molecular clips 3a and 3b form tapelike structures in the crystal due to pi-pi interactions between the aromatic walls. Compounds 3d, 3eC, and 3fC form dimers driven by critical C-H center dot center dot center dot O interactions and then form tapes driven by pi-pi interactions in the crystal. These two building motifs, pi-pi and C-H center dot center dot center dot O interactions, can be used to rationalize the ena...
