Crystal structure and Hirshfeld surface analysis of the chalcone derivative (2)-3-[4-(di-phenyl-amino)phen-yl]-1-[4-(prop-1-yn-2-yl-oxy)phen-yl]prop-2-en-1-one.

In the crystal structure of the title chalcone derivative, CHNO, the mol-ecule adopts an s- conformation with respect to the C=O and C=C bonds. The tri-phenyl-amine moiety has a propeller-type shape, with dihedral angles between the mean planes of pairs of phenyl rings of 72.1 (6), 69.7 (1) and 65.6 (6)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming chains extending parallel to [010]. In addition, weak C-H⋯π inter-actions consolidate the crystal packing. One of the phenyl rings of the tri-phenyl-amine moiety is disordered over two sets of sites.