(2E)-1-(3,5-Di-hydroxy-phen-yl)-3-(4-meth-oxy-phen-yl)prop-2-en-1-one

Crystal structure of 3-(4-methoxyphenyl)-1-(4-methylphenyl)prop-2-en-1-one, C17H16O2

C17H16O2, monoclinic, P21/c (no. 14), a = 11.6963(12) Å, b = 11.1187(8) Å, c = 11.6902(10) Å, β = 115.545(7)°, V = 1371.7(2) Å3, Z = 4, R gt(F) = 0.0350, wR ref(F 2) = 0.0865, T = 293 K.

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

The mol-ecular structure of the title compound, C21H18O4, consists of a 3,4-di-meth-oxy-phenyl ring and a naphthalene ring system linked via a prop-2-en-1-one spacer. The mol-ecule is almost planar, with a dihedral angle between the benzene ring and the naphthalene ring system of 2.68 (12)°. There is an intra-molecular O-H⋯O hydrogen bond involving the adjacent hy-droxy and carbonyl groups. The mol-ecule has an E conformation 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 bifurcated C-H⋯(O,O) hydrogen bonds, enclosing an R 2 (1)(6) ring motif, and by a further C-H⋯O hydrogen bond, forming undulating sheets extending in b- and c-axis directions. There are π-π inter-actions between the sheets, involving inversion-related naphthalene and benzene rings [inter-centroid distance = 3.7452 (17) Å], forming a three-dimensional structure.

Crystal structure of 5-(4-benzyl-oxyphen-yl)-3-(4-meth-oxy-phen-yl)-6-methyl-cyclo-hex-2-en-1-one

5-(4-Benzyl­oxyphen­yl)-3-(4-meth­oxy­phen­yl)-6-methyl­cyclo­hex-2-en-1-one crystallized with two independent mol­ecules in the asymmetric unit. The cyclo­hexene ring adopts an envelope conformation in both mol­ecules, with the C atom to which is attached the central benzene ring as the flap. The crystal packing, is stabilized by C—H⋯π inter­actions.

The title compound, C₂₇H₂₆O₃, crystallized with two independent mol­ecules (A and B) in the asymmetric unit. In mol­ecule A, the plane of the central benzene ring forms dihedral angles of 75.78 (14) and 52.75 (16)° with that of the terminal benzene rings, and the dihedral angle between the planes of the terminal benzene rings is 51.49 (17)°. The corresponding values for mol­ecule B are 75.18 (14), 58.11 (16) and 47.91 (16)°, respectively. The cyclo­hexene ring adopts an envelope conformation in both mol­ecules, with the C atom to which is attached the central benzene ring as the flap. The crystal packing, is stabilized by C—H⋯π inter­actions.