(E)-3-(4-Meth­oxy­phen­yl)-3-[3-(4-meth­oxy­phen­yl)-1H-pyrazol-1-yl]prop-2-enal

In the title mol­ecule, C₂₀H₁₈N₂O₃, the pyrazole ring forms a dihedral angle of 2.2 (1)° with its meth­oxy­phenyl substituent and a dihedral angle of 67.2 (1)° with the benzene substituent on the propenal unit. In the crystal, mol­ecules are connected by weak C—H...O hydrogen bonds, forming R₂²(26) and R₂²(28) cyclic dimers that lie about crystallographic inversion centres. These dimers are further linked through C—H...O and C—H...N hydrogen bonds, forming C(8), C(9), C(10) and C(16) chain motifs. These primary motifs are further linked to form secondary C₂²(15) chains and R₂²(18) rings.

4-(2-Hy­droxy­phen­yl)-3,5-di­thia­hepta­ne­dioic acid

In the crystal of the title compound, C₁₁H₁₂O₅S₂, mol­ecules are linked by O—H...O hydrogen bonds and C—H...O inter­actions, forming a three-dimensional network.

1,5-Bis(4-chloro­phen­yl)-3-(4-methyl­phen­yl)pentane-1,5-dione

In the title mol­ecule, C₂₄H₂₀Cl₂O₂, the central methyl­benzene ring forms dihedral angles of 42.47 (10) and 34.34 (10)° with the terminal 4-chloro­phenyl fragments. The dihedral angle between the chloro­benzene rings is 34.45 (11)°. A weak intra­molecular C—H...O inter­action generates an S(6) ring motif. The crystal packing exhibits weak C—H...O hydrogen bonds and C—H...π inter­actions.