Crystal structure and Hirshfeld surface analysis of 2-(4-nitro-phen-yl)-2-oxoethyl 2-chloro-benzoate.

The title compound, CHClNO, is relatively planar with the two aromatic rings being inclined to each other by 3.56 (11)°. The central -C(=O)-C-O-C(=O)- bridge is slightly twisted, with a C-C-O-C torsion angle of 164.

Crystal structure and Hirshfeld surface analysis of 2-(4-nitro-phen-yl)-2-oxoethyl picolinate.

2-(4-Nitro-phen-yl)-2-oxoethyl picolinate, CHNO, was synthesized under mild conditions. The chemical and mol-ecular structures were confirmed by single-crystal X-ray diffraction analysis. The mol-ecules are linked by inversion into centrosymmetric dimers weak inter-molecular C-H⋯O inter-actions, forming (10) ring motifs, and further strengthened by weak π-π inter-actions.

Crystal structure and Hirshfeld surface analysis of 2-(4-nitro-phen-yl)-2-oxoethyl benzoate.

The title com-pound, CHNO, is relatively planar, with the planes of the two aromatic rings being inclined to each other by 3.09 (5)°. In the crystal, mol-ecules are linked by a pair of C-H⋯O hydrogen bonds, forming inversion dimers, which enclose an (16) ring motif.

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

The mol-ecular structure of the title compound, CHClFO, consists of a 4-chloro-3-fluoro-phenyl ring and a 3,4-di-meth-oxy-phenyl ring linked a prop-2-en-1-one spacer. The mol-ecule has an configuration about the C=C bond and the carbonyl group is with respect to the C=C bond. The F and H atoms at the positions of the 4-chloro-3-fluoro-phenyl ring are disordered over two orientations, with an occupancy ratio of 0.

Crystal structure and Hirshfeld surface analysis of ()-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, CHClOS, consists of a 2,5- di-chloro-thio-phene ring and a 2-chloro-phenyl ring linked 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)°.

Crystal structure and Hirshfeld surface analysis of (2)-3-(2,4-di-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, CHClOS, consists of a 2,5-di-chloro-thio-phene ring and a 2,4-di-chloro-phenyl ring linked a prop-2-en-1-one spacer. The dihedral angle between the 2,5-di-chloro-thio-phene ring and the 2,4-di-chloro-phenyl ring is 12.24 (15)°.

Crystal structure and Hirshfeld surface analysis of ()-3-(2-chloro-4-fluoro-phen-yl)-1-(2,5-di-chloro-thio-phen-3-yl)prop-2-en-1-one.

In the title chalcone-thio-phene derivative, CHClFOS, the aromatic rings are inclined to one another by 12.9 (2)°, and the thio-phene ring is affected by π-conjugation. In the crystal, mol-ecules are linked by C-H⋯F hydrogen bonds, forming an (8) ring motif.

Crystal structure and Hirshfeld surface analysis of (2)-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, CHBrFO, 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.

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

In title compound, CHClO, 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 (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 plane.

Crystal structure and Hirshfeld surface analysis of a pyridiniminium bromide salt: 1-[2-([1,1'-biphen-yl]-4-yl)-2-oxoeth-yl]-3-methyl-1,4-di-hydro-pyridin-4-iminium bromide.

In the cation of the title salt, CHNO·Br, the phenyl rings are inclined to one another by 38.38 (8)°, whereas the central phenyl ring and the pyridiniminium ring are almost perpendicular with a dihedral angle of 87.37 (9)°.