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Updated: May 26, 2026

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Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
4-Chloro-selanyl-3,5-diethyl-1H-pyrazol-2-ium chloride
Acta Crystallographica. Section E, Structure Reports Online
|January 6, 2012
Abstract:
In the cation of the title compound, C(7)H(12)ClN(2)Se(+)·Cl(-), the ethyl-ene groups and the Se-Cl fragment adopt a cis configuration with a C-Se-Cl angle of 96.09 (6)°. In the crystal, inter-molecular N-H⋯Cl hydrogen bonds link two cations and two chlorine anions into centrosymmetric clusters. π-π inter-actions between the pyrazole rings [centroid-centroid distance of 3.530 (2) Å] link these clusters into columns along [001] with short inter-molecular Se⋯Cl(-) contacts of 2.995 (1) Å.

