(E)-3-Phenyl-3-(3-phenyl-1H-1-pyrazol­yl)-2-propenal

In the title compound C18H14N2O, the pendant rings make dihedral angles of 66.1 (1)° and 13.9 (1) with the central ring. In the crystal, two mol­ecules form a cyclic centrosymmetric R 2 2(22) dimer through pairs of C—H⋯O bonds. These dimers are further connected into zigzag chains extending along the b axis through C—H⋯π and C—H⋯O inter­actions

(E)-3-(4-Chloro­phen­yl)-3-[3-(4-chloro­phen­yl)-1H-pyrazol-1-yl]prop-2-enal

In the title compound, C18H12Cl2N2O, the pyrazole ring is almost planar [r.m.s. deviation = 0.002 Å] while the two chloro­phenyl rings are twisted out from the plane of the pyrazole ring, making dihedral angles of 5.3 (1) and 65.34 (4)°. In the crystal, centrosymmetric R 2 2(24) dimers are formed about crystallographic inversion centres through a pair of C—H⋯Cl inter­actions. These dimers are further linked through a C—H⋯O hydrogen bond, forming a C(8) chain extending along the a axis. C—H⋯π inter­actions are also observed

1-(2,4-Dinitrophenyl)-3-phenyl-4-phenylsulfanyl-1H-pyrazole

In the title molecule, C21H14N4O4S, the pyrazole ring forms dihedral angles of 45.6 (1), 87.7 (1) and 27.4 (1)° with the phenyl, sulfur-substituted benzene and nitro-substituted benzene rings, respectively. In the crystal, molecules are connected by weak C—H...O and C—H...N hydrogen bonds into layers parallel to (010)

1-(2,4-Dinitrophenyl)-3-phenyl-4-phenylsulfanyl-1H-pyrazole

In the title molecule, C21H14N4O4S, the pyrazole ring forms dihedral angles of 45.6 (1), 87.7 (1) and 27.4 (1)° with the phenyl, sulfur-substituted benzene and nitro-substituted benzene rings, respectively. In the crystal, molecules are connected by weak C—H...O and C—H...N hydrogen bonds into layers parallel to (010)

(E)-3-(4-Methoxyfenyl)-3-[3-(4-methoxyfenyl)-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 R2 2(26) and R2 2(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 C2 2(15) chains and R2 2(18) rings.V titulní molekule, C20H18N2O3, svírá pyrazolový kruh dihedralní úhel 2.2 (1)° s methoxyfenylovým substituentem a dihedralní úhel 67.2 (1)° s benzenovým jádrem propenalové jednmotky. V krystalu jsou molekuly poutány slabými C-H...O vodíkovými vazbami, tvořícími R2 2(26) a R2 2(28) cyklické dimery, které tvoří krystalografická inversní centra. Tyto dimery jsou dále spojeny C-H...O and C-H...N vodíkovými vazbami, tvořícími C(8), C(9), C(10) a C(16) řetězce. Tyto primární motivy jsou dále spojeny do sekundarních C2 2(15) řetězců a R2 2(18) kruhů

(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