Crystal structure and Hirshfeld surface analysis of ()-1-(3,5-di-chloro-2-hy-droxy-phen-yl)-3-(5-methyl-furan-2-yl)prop-2-en-1-one.

The title chalcone derivative, CHClO, is almost planar, with a dihedral angle of 7.0 (2) ° between the 3,5-di-chloro-2-hy-droxy-phenyl and 5-methyl-furan rings. There is an intra-molecular O-H⋯O hydrogen bond present forming an (6) ring motif.

1-Acryloyl-2,6-bis-(4-chloro-phen-yl)-3,5-dimethyl-piperidin-4-one.

In the crystal structure of the title compound, C(22)H(21)Cl(2)NO(2), the piperidinone ring is in a boat conformation.

1-(2-Chloro-acet-yl)-3-methyl-2,6-bis-(3,4,5-trimethoxy-phen-yl)piperidine-4-one.

In the crystal structure of the title compound, C(26)H(32)ClNO(8), the piperidine ring is in a twist-chair conformation, with puckering parameters Q = 0.655 (4) Å, θ = 93.1 (1) and ϕ = 254.