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Updated: Jun 5, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
2,6-Bis(3-phenyl-1H-pyrazol-5-yl)pyridine monohydrate
1Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Abstract:
In the title compound, C(23)H(17)N(5)·H(2)O, the pyrazole rings are slightly twisted from the central pyridine ring, forming dihedral angles of 5.3 (2) and 3.5 (2)°. The pyrazole and phenyl rings on each side of the pyridine ring are also approximately coplanar, making dihedral angles of 6.0 (2) and 4.5 (2)°. In the crystal structure, 2,6-bis-(3-phenyl-1H-pyrazol-5-yl)pyridine and water mol-ecules are linked together via N-H⋯O and O-H⋯N hydrogen bonds, forming a column running parallel to the a axis.

