In the title compound, C(20)H(18)ClN(3)O, the dihedral angle between the pyrazole and the 3H-indole components is only 13.28 (6)°, indicating that there is conjugation between the two heterocyclic subunits. The N-methoxy-phenyl unit makes a dihedral angle of 25.10 (7)° with the pyrazole ring.

The title compound, C(23)H(17)N(3), can be used in coordination chemistry. The anthracene ring makes dihedral angles of 86.08 (5) and 76.63 (6)°, respectively, with the pyridine and pyrazole rings. The dihedral angle between the pyrazole and pyrimidine rings is 11.79 (7)°. In the structure, weak inter-molecular C-H⋯N hydrogen bonds are observed.

In the title compound, C(11)H(12)N(2)O(2), the dihydro-pyrazole and benzene rings are oriented at a dihedral angle of 68.35 (5)°. The dihydro-pyrazole ring is planar, with a mean deviation from the mean plane of 0.0409 Å. The crystal structure is stabilized by O-H⋯O and C-H⋯O hydrogen bonds.

In the title compound, C(29)H(20)Cl(2)N(2)S(2), the pyrazole ring adopts a planar conformation. The chlorophenyl rings are twisted from the pyrazole ring at angles of 52.74 (14) and 29.92 (13)°, respectively. The crystal structure is stabilized by C-H⋯N and C-H⋯π inter-actions.

The development of metal base pairs is of immense importance for the construction of DNA nanostructures. Here we report the synthesis of a biaryl pyrazole-phenol nucleoside that forms in DNA a stable self-pair upon complexation of a Cu(II) ion. A sequence with five consecutive pyrazole nucleotides allows the complexation of five Cu(II) ions in a row.

The synthesis of novel pyrazole derivatives and investigations of their chemical and biological behavior have gained more importance in recent decades for biological, medicinal, and agricultural reasons. Concerning the attempt to synthesize some novel pyrazole and fused pyrazole derivatives from 4-benzoyl5-phenyl-2,3-furandione 1 and various hydrazines or hydrazones, the synthesis of 4-benzoyl-...

The 351.1 nm photoelectron spectrum of 1-pyrazolide anion has been measured. The 1-pyrazolide ion is produced by hydroxide (HO(-)) deprotonation of pyrazole in a flowing afterglow ion source. The electron affinity (EA) of the 1-pyrazolyl radical has been determined to be 2.938 +/- 0.005 eV. The angular dependence of the photoelectrons indicates near-degeneracy of low-lying states of 1-pyrazolyl...

A novel cyclophane consisting of methylene-bridged imidazolium- and pyrazole-moieties (calix[4]imidazolium[2]pyrazole) and two of its applications are presented. First, supramolecular recognition of an acetonitrile molecule by hydrogen bonding in the solid state is examined. Second, the capability to act as a ligand precursor is shown by the synthesis and characterisation of the respective dinu...

In the title mol-ecule, C(12)H(12)ClN(3)O(2), the benzene and pyrazole rings are inclined to each other at a dihedral angle of 83.3 (3)°. In the crystal, mol-ecules are linked into [010] chains via O-H⋯N hydrogen bonds with the unsubstituted pyrazole N atom acting as the acceptor.

The asymmetric unit of the title compound, C16H11BrN2O, contains two independent mol-ecules with slightly different geometries. The 4-bromo-benzene ring forms dihedral angles of 26.0 (2) and 39.9 (7)° with the pyrazole ring in the two mol-ecules while the phenyl ring is oriented at 19.7 (5) and 7.3 (0)° with respect to the pyrazole ring.