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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
2-[4-(4,5-Dihydro-1H-pyrrol-2-yl)phen-yl]-4,5-dihydro-1H-imidazole
Abstract:
The mol-ecule of the title compound, C(12)H(14)N(4), lies about a crystallographic inversion centre. The five- and six-membered rings are twisted from each other, forming a dihedral angle of 18.06 (7)°. In the crystal structure, neighbouring mol-ecules are linked by inter-molecular N-H⋯N hydrogen bonds into one-dimensional infinite chains forming 18-membered rings with R(2) (2)(18) motifs. The crystal structure is further stabilized by weak inter-molecular π-π stacking [centroid-centroid distance = 3.8254 (6) Å] and C-H⋯π inter-actions.
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