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Updated: Jun 1, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
4,4'-(1,3,4-Oxadiazole-2,5-diyl)di-pyri-dinium dibromide monohydrate
1Ordered Matter Science Research Center, College of Chemistry and Chemical, Engineering, Southeast University, Nanjing 211189, People's Republic of China.
Abstract:
In the title compound, C(12)H(10)N(4)O(+)·2Br(-)·H(2)O, the cation is approximately planar: the terminal rings make a dihedral angle of 7.91 (6)° with each other and dihedral angles of 6.02 (1) and 6.50 (8)° with the central ring. It is linked to the bromide anions and water mol-ecules by N-H⋯Br hydrogen bonds. In addition, O-H⋯Br and N-H⋯Br hydrogen bonds link these units into a three-dimensional network. C-H⋯N, C-H⋯Br and N-H⋯O inter-actions are also observed.
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