Synthesis and crystal structures of 1-benzoyl-4-(4-nitro­phen­yl)piperazine and 1-(4-bromo­benzo­yl)-4-phenyl­piperazine at 90 K

Archana, S. D. and Kiran Kumar, H. and Shankara Prasad, H. J. and Yathirajan, H. S. and Parkin, Sean (2022) Synthesis and crystal structures of 1-benzoyl-4-(4-nitro­phen­yl)piperazine and 1-(4-bromo­benzo­yl)-4-phenyl­piperazine at 90 K. Acta Crystallographica Section E, 78 (10). pp. 1028-1033. ISSN 2056-9890

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Abstract

Synthesis and crystal structures of 1-benzoyl-4-(4-nitro­phen­yl)piperazine, C17H17N3O3, (I) and 1-(4-bromo­benzo­yl)-4-phenyl­piperazine, C17H17BrN2O, (II) are described. Compounds I and II crystallize in the ortho­rhom­bic and monoclinic crystal systems with space groups Pna21 (Z′ = 2, I) and P21 (Z′ = 1, II), respectively. The crystal of II was a two-component aggregate, treated as a `twin' for data-acquisition purposes. There are no conventional hydrogen bonds in either I or II, but there are weaker C—H⋯O contacts. Each mol­ecule consists of a central piperazine ring in a chair conformation, with either benzoyl and nitro­phenyl (I) or 4-bromo­benzoyl and phenyl (II) groups attached to different nitro­gen atoms of the piperazine. The various atom–atom contact coverages as qu­anti­fied by Hirshfeld surface analysis fingerprint plots are given.

Item Type:	Article
Uncontrolled Keywords:	piperazine, crystal structure, absolute structure, aggregate crystal
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	01 Oct 2022 05:38
Last Modified:	01 Oct 2022 05:38
URI:	http://eprints.uni-mysore.ac.in/id/eprint/17379

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