4-(4-Fluoro­phen­yl)-1-phenyl-3-(pyridin-4-yl)-1H-pyrazol-5-amine

In the title compound, C₂₀H₁₅FN₄, the pyrazole ring forms dihedral angles of 43.51 (6), 39.95 (6) and 32.23 (6)° with the directly attached 4-fluoro­phenyl, pyridine and phenyl rings, respectively. The crystal packing is stabilized by inter­molecular N—H...N and N—H...F hydrogen bonds.

4-(4-Fluoro­phen­yl)-1-(4-nitro­phen­yl)-3-(pyridin-4-yl)-1H-pyrazol-5-amine

In the crystal structure of the title compound, C₂₀H₁₄FN₅O₂, the pyrazole ring forms dihedral angles of 59.3 (2), 25.6 (2) and 46.0 (2)° with the directly attached 4-fluoro­phenyl, pyridine and nitro­phenyl rings, respectively. The crystal packing is characterized by inter­molecular N—H...N and N—H...O hydrogen bonds.

Ethyl 5-amino-3-(pyridin-4-yl)-1-(2,4,6-tri­chloro­phen­yl)-1H-pyrazole-4-carb­oxyl­ate dimethyl sulfoxide hemisolvate

The asymmetric unit of the title compound, C₁₇H₁₃Cl₃N₄O₂·0.5C₂H₆OS, contains two almost identical mol­ecules and one dimethyl sulfoxide (DMSO-d₆) solvent mol­ecule. The pyrazole ring forms dihedral angles of 54.6 (4) and 80.0 (4)° in one mol­ecule, and dihedral angles of 54.2 (4) and 81.2 (4)° in the other mol­ecule, with the directly attached pyridine and trichloro­phenyl rings, respectively. The dihedral angles of the pyridine and trichloro­phenyl rings are 51.2 (4) and 52.0 (4)°, respectively. The crystal packing is characterized by intra- and inter­molecular hydrogen bonds. The crystal is a nonmerohedral twin with a contribution of 0.488 (1) for the minor twin component. The terminal ethyl group of one mol­ecule and the S atom of DMSO are disordered over two sites.

4-[5-Amino-4-(4-fluoro­phen­yl)-3-(pyridin-4-yl)-1H-pyrazol-1-yl]benzo­nitrile

In the crystal structure of the title compound, C₂₁H₁₄FN₅, the pyrazole ring forms dihedral angles of 38.0 (1), 40.0 (1) and 28.5 (1)° with the directly attached 4-fluoro­phenyl, pyridine and benzonitrile rings, respectively. The crystal packing is characterized by N—H...N hydrogen bonds, which result in a two-dimensional network parallel to the ac-plane.

4-(4-Fluoro­phen­yl)-3-(pyridin-4-yl)-1-(2,4,6-trichloro­phen­yl)-1H-pyrazol-5-amine

In the title compound, C₂₀H₁₂Cl₃FN₄, the pyrazole ring forms dihedral angles of 47.51 (9), 47.37 (9) and 74.37 (9)° with the directly attached 4-fluoro­phenyl, pyridine and 2,4,6-trichloro­phenyl rings, respectively. Only one of the two amino H atoms is involved in hydrogen bonding. The crystal packing is characterized by N—H...N hydrogen bonds, which result in infinite chains parallel to the c axis.