(1E,4E)-1-(2-Nitro­phen­yl)-5-(2,6,6-trimethyl­cyclo­hex-1-en-1-yl)penta-1,4-dien-3-one

In the title curcumin–ionone derivative, C₂₀H₂₃NO₃, the dihedral angle between the cyclo­hexene and benzene rings is 21.03 (8)°, with both double bonds in the inter­linking olefinic chain adopting E conformations. Two of the methyl­ene groups of the β-ionone ring are disordered over two sets of sites with occupancy ratios of 0.50:0.50 and 0.60:0.40. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds into zigzag chains extending along the b axis.

(1E,4E)-1-(Thio­phen-2-yl)-5-(2,6,6-trimethyl­cyclo­hex-1-en-1-yl)penta-1,4-dien-3-one

In the title curcumin-ionone derivative, C₁₈H₂₂OS, the dihedral angle between the thia­zole ring and the mean plane through the cyclo­hexene ring is 5.16 (10)°. The mol­ecule has an E conformation for each of the olefinic bonds.