nan Kamni

Crystal structure of 15,16-ep-oxy-7β,9α-di-hydroxy-labdane-13(16),14-dien-6-one.

In the title molecule, C20H30O4, both cyclohexane rings adopt chair conformations. In the crystal, molecules are connected by O—H⋯O hydrogen bonds forming chains along [100]. In addtion, an intramolecular O—H⋯O hydrogen bond forms an S(5) ring.

(E)-3-(4-Bromo­phen­yl)-1-(3,4-dichloro­phen­yl)prop-2-en-1-one

The molecule of the title compound, C15H9BrCl2O, is shown to be the E isomer, with the 3,4-dichlorobenzoyl and p-bromophenyl substituents in trans positions with respect to the chalcone olefin bond. The molecule is non-planar, the two aromatic rings forming a dihedral angle of 49.58 (1)°.

3-Anilinothio-carbonyl-4-hydroxy-chromen-2-one.

The geometrical parameters of the title compound, C16H11NO3S, are in the usual ranges. The two aromatic residues are not coplanar and are twisted by a dihedral angle of 66.63 (6)°. The crystal structure is stabilized by N—H⋯O and O—H⋯S interactions.

Synthesis and Crystal Structure of a Chalcone Derivative

Abstract(2E)-3-(anthrance-9-yl)-1-(3,4-dichlorophenyl)prop-2-en-1-one [C23H14OCl2] is synthesized and its crystal structure is determined by single X-ray diffraction. There exist two molecules in the asymmetric unit. The dihedral angle between the benzene and anthracene moiety of the molecule A and B is 86.51(12)° and 76.42(13)°, respectively. No classical hydrogen bonds are observed and only van der Waals forces stabilize the crystal packing.

Crystal structure of 4-[(E)-(4-chloro-benzyl-idene)amino]-3-(2-methyl-benz-yl)-1H-1,2,4-triazole-5(4H)-thione.

In the title molecule, C17H15ClN4S, the benzene rings form dihedral angles of 16.6 (1) and 77.2 (1)° with the triazole ring. The dihedral angle between the benzene rings is 86.6 (1)°. In the crystal, pairs of N—H⋯S hydrogen bonds form inversion dimers with graph-set notation R 2 2(8). Weak C—H⋯S hydrogen bonds link these dimers into layers parallel to (100). Weak intramolecular C—H⋯S and C—H⋯N contacts are observed.