Crystal structure of (E)-3-(3,4-di-meth-oxy-phen-yl)-1-(1-hy-droxy-naphthalen-2-yl)prop-2-en-1-one

Crystal structure and Hirshfeld surface analysis of (E)-3-(2-chloro-phen-yl)-1-(2,5-di-chloro-thio-phen-3-yl)prop-2-en-1-one

The mol-ecular structure of the title compound, C13H7Cl3OS, consists of a 2,5- di-chloro-thio-phene ring and a 2-chloro-phenyl ring linked via a prop-2-en-1-one spacer. The dihedral angle between the 2,5-di-chloro-thio-phene and 2-chloro-phenyl rings is 9.69 (12)°. The mol-ecule has an E configuration about the C=C bond and the carbonyl group is syn with respect to the C=C bond. The mol-ecular conformation is stabilized by two intra-molecular C-H⋯Cl contacts and one intra-molecular C-H⋯O contact, forming S(5)S(5)S(6) ring motifs. In the crystal, the mol-ecules are linked along the a-axis direction through van der Waals forces and along the b axis by face-to-face π-stacking between the thio-phene rings and between the benzene rings of neighbouring mol-ecules, forming corrugated sheets lying parallel to the bc plane. The inter-molecular inter-actions in the crystal packing were further analysed using Hirshfield surface analysis, which indicates that the most significant contacts are Cl⋯H/ H⋯Cl (28.6%), followed by C⋯H/H⋯C (11.9%), C⋯C (11.1%), H⋯H (11.0%), Cl⋯Cl (8.1%), O⋯H/H⋯O (8.0%) and S⋯H/H⋯S (6.6%).

Crystal structure and Hirshfeld surface analysis of (2E)-1-(3-bromo-phen-yl)-3-(4-fluoro-phen-yl)prop-2-en-1-one

In the title compound, C15H10BrFO, the mol-ecular structure consists of a 3-bromo-phenyl ring and a 4-fluoro-phenyl ring linked via a prop-2-en-1-one spacer. The 3-bromophenyl and 4-fluorophenyl rings make a dihedral angle of 48.90 (15)°. The mol-ecule has an E configuration about the C=C bond and the carbonyl group is syn with respect to the C=C bond. In the crystal, mol-ecules are linked by C-H⋯π inter-actions between the bromo-phenyl and fluoro-phenyl rings of mol-ecules, resulting in a two-dimensional layered structure parallel to the ab plane. The mol-ecular packing is stabilized by weak Br⋯H and F⋯H contacts, one of which is on the one side of each layer, and the second is on the other. The inter-molecular inter-actions in the crystal packing were further analysed using Hirshfeld surface analysis, which indicates that the most significant contacts are Cl⋯H/H⋯Cl (20.8%), followed by C⋯H/H⋯C (31.1%), H⋯H (21.7%), Br⋯H/H⋯Br (14.2%), F⋯H/H⋯F (9.8%), O⋯H/H⋯O (9.7%).

Crystal structure and Hirshfeld surface analysis of (2E)-3-(3-bromo-4-fluoro-phen-yl)-1-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one

In the mol-ecule of the title compound, C17H14BrFO3, the aromatic rings are tilted with respect to the enone bridge by 13.63 (14) and 4.27 (15)°, and form a dihedral angle 17.91 (17)°. In the crystal, centrosymmetrically related mol-ecules are linked by pairs of C-H⋯O hydrogen bonds into dimeric units, forming rings of R22(14) graph-set motif. The dimers are further connected by weak C-H⋯O hydrogen inter-actions, forming layers parallel to (10). Hirshfeld surface analysis shows that van der Waals inter-actions constitute the major contribution to the inter-molecular inter-actions, with H⋯H contacts accounting for 29.7% of the surface.

Crystal structure and Hirshfeld surface analysis of (2E)-3-(3-chloro-phen-yl)-1-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one

In title compound, C17H15ClO3, the dihedral angle between the benzene and chloro-phenyl rings is 18.46 (7)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen contacts, enclosing an R22(14) ring motif, and by a further C-H⋯O hydrogen contact, forming a two-dimensional supra-molecular structure extending along the direction parallel to the ac plane. Hirshfeld surface analysis shows that van der Waals inter-actions constitute the major contribution to the inter-molecular inter-actions, with H⋯H contacts accounting for 36.2% of the surface.

Crystal structure of (E)-1-(1-hy-droxy-naphthalen-2-yl)-3-(2,3,4-tri-meth-oxy-phen-yl)prop-2-en-1-one

The title compound, C22H20O5, is composed of a hy-droxy-naphthyl ring and a tri-meth-oxy-phenyl ring [the planes of which are inclined to one another by 21.61 (10)°] bridged by an unsaturated prop-2-en-1-one group. The mean plane of the prop-2-en-1-one group [-C(=O)-C=C-] is inclined to that of the naphthyl system and benzene rings by 3.77 (14) and 18.01 (16)°, respectively. There is an intra-molecular O-H⋯O hydrogen bond present forming an S(6) ring motif. In the crystal, inversion-related mol-ecules are linked by a slipped-parallel π-π inter-action [inter-centroid distance = 3.8942 (13) Å, inter-planar distance = 3.478 (9) Å and slippage = 1.751 Å], and stack along the [101] direction. There are no other significant inter-molecular inter-actions present.