Crystal structure and Hirshfeld surface analysis of 3-[2-(3,5-di-methyl-phen-yl)hydrazinyl-idene]benzo-furan-2(3)-one.

In the title compound, CHNO, the 2,3-di-hydro-1-benzo-furan ring system is essentially planar and makes a dihedral angle of 3.69 (7)° with the di-methyl-phenyl ring. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond with an (6) ring motif.

Crystal structure and Hirshfeld surface analysis of (3)-7-meth-oxy-3-(2-phenyl-hydrazinyl-idene)-1-benzo-furan-2(3)-one.

In the title compound, CHNO, pairs of mol-ecules are linked into dimers by N-H⋯O hydrogen bonds, forming an (12) ring motif, with the dimers stacked along the axis. These dimers are connected through π-π stacking inter-actions between the centroids of the benzene and furan rings of their 2,3-di-hydro-1-benzo-furan ring systems. Furthermore, there exists a C-H⋯π inter-action that consolidates the crystal packing.

Crystal structure and Hirshfeld surface analysis of 4-{2,2-di-chloro-1-[()-(4-chloro-phen-yl)diazen-yl]ethen-yl}-,-di-methyl-aniline.

The title compound, CHClN, comprises three mol-ecules of similar shape in the asymmetric unit. The crystal cohesion is ensured by inter-molecular C-H⋯N and C-H⋯Cl hydrogen bonds in addition to C-Cl⋯π inter-actions. Hirshfeld surface analysis and two-dimensional fingerprint plots reveal that Cl⋯H/H⋯Cl (33.

Crystal structure and Hirshfeld surface analysis of ()-4-{[2,2-di-chloro-1-(4-meth-oxy-phen-yl)ethen-yl]diazen-yl}benzo-nitrile.

In the title compound, CHClNO, the 4-meth-oxy-substituted benzene ring makes a dihedral angle of 41.86 (9)° with the benzene ring of the benzo-nitrile group. In the crystal, mol-ecules are linked into layers parallel to (020) by C-H⋯O contacts and face-to-face π-π stacking inter-actions [centroid-centroid distances = 3.