(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)degrees with its methoxyphenyl substituent and a dihedral angle of 67.2 (1)degrees with the benzene substituent on the propenal unit. In the crystal, molecules are connected by weak C-H center dot center dot center dot O hydrogen bonds, forming R-2(2) (26) and R-2(2) (28) cyclic dimers that lie about crystallographic inversion centres. These dimers are further linked through C-H center dot center dot center dot O and C-H center dot center dot center dot N hydrogen bonds, forming C(8), C(9), C(10) and C(16) chain motifs. These primary motifs are further linked to form secondary C-2(2) (15) chains and R-2(2) (18) rings.