Hydrazone–aromatic interaction: the vital role in molecular self-assembly of benzaldehyde hydrazones

A scarce NNC⋯π interaction, which plays an essential role in defining the crystal packing patterns, has been found widespread in benzaldehyde (cyanoacetyl)hydrazones, and is rationalized by density functional theory calculations.

A scarce CC⋯CN π-hole interaction in (E)-isomers of 3-[(4-halogenphenyl)amino]-2-cyanoprop-2-enoates

A scarce and interesting CC⋯CN π-hole interaction has been found to occur in (E)-3-[(4-halogenphenyl)amino]-2-cyanoprop-2-enoates, which plays an essential role in defining the crystal packing patterns.