Crystal structure of ( Z )-3-{2-[( Z )-11 H -indeno[1,2- b ]quinoxalin-11-ylidene]hydrazinyl}- N -phenylbut-2-enamide monohydrate

Acta Crystallographica Section E Crystallographic Communications 2026 Open access

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Authors: G. Ahmed Ezet Eldeken, Fatma A. El‐Samahy, Ehab M. Zayed, Fayez H. Osman, Khaled Mahmoud, Galal H. Elgemeie, Peter G. Jones
DOI: 10.1107/s2056989026002343
Cited by: 0
References: 27

Abstract

In the title compound, ( Z )-3-{2-[( Z )-11 H -indeno[1,2- b ]quinoxalin-11-ylidene]hydrazinyl}- N -phenylbut-2-enamide monohydrate, C 25 H 19 N 5 O·H 2 O, the configurations around the C=N and C=C double bonds adjacent to the hydrazinyl moiety are both Z . Except for the phenyl group, the molecule is almost planar, promoted by the three-centre intramolecular N hydrazinyl —H...(O carbonyl , N quinoxaline ) hydrogen bond. The water molecule participates in three hydrogen bonds, as donor towards O carbonyl (within the asymmetric unit) and the other N quinoxaline ( via an inversion operator) and as acceptor from the amide N—H group ( via a b -glide operator). The hydrogen bonds combine to form a layer structure parallel to the ab plane.

Fields of Study & Subjects

Crystal structures of chemical compounds Synthesis and Biological Evaluation Crystallography and molecular interactions

Publication details

Journal / source
Acta Crystallographica Section E Crystallographic Communications
Volume
82
Issue
4
Pages
353–356
Publication date
5 March 2026
Language
EN