4-{(4Z)-4-[(2Z)-3-(4-Fluoroanilino)-1-hydroxybut-2-en-1-ylidene]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzenesulfonamide

4-{(4Z)-4-[(2Z)-3-(4-Fluoroanilino)-1-hydroxybut-2-en-1-ylidene]-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzenesulfonamide

In the title compound, C20H19FN4O4S, the pyrazole and benzenesulfonamide rings are coplanar [dihedral angle = 5.02 (15)°] but this planarity does not extend over the entire molecule, the dihedral angle between the terminal six-membered rings being 33.24 (14)&...

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Bibliographic Details
Main Authors: Edward R. T. Tiekink, Hassan M. Faidallah, Seik Weng Ng, Abdullah M. Asiri
Format: Article
Language:English
Published: International Union of Crystallography 2012-03-01
Series:Acta Crystallographica Section E
Online Access:http://scripts.iucr.org/cgi-bin/paper?S1600536812006502
Description
Summary:In the title compound, C20H19FN4O4S, the pyrazole and benzenesulfonamide rings are coplanar [dihedral angle = 5.02 (15)°] but this planarity does not extend over the entire molecule, the dihedral angle between the terminal six-membered rings being 33.24 (14)°. Intramolecular hydroxy–hydroxy O—H...O and amine–hydroxy N—H...O hydrogen bonds, as a well as a tight C—H...O(carbonyl) interaction, lead to a sequence of three fused S(6) rings. Supramolecular chains along the a axis feature in the crystal packing; these chains are stabilized by amine–sulfonamide N—H...O and amine–pyrazole N—H...N hydrogen bonds.
ISSN:1600-5368

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