In the title compound, C 15H 17BrN 2O 2, both pyrrolidinone rings adopt envelope conformations. The crystal packing is characterized by short C - Br⋯O=C inter-actions [Br⋯O = 3.1730 (13) Å], leading to supra-molecular dimers. Inter-molecular C - H⋯O and C - H⋯π inter-actions are also observed.

Satheesh A

Department of Thermal and Energy Engineering

School of Mechanical Engineering

Vellore Campus

Sathiyanarayanan K

Department of Chemistry

School of Advanced Sciences

Li H.-Q

Ramachandran G

Rathore R.S.

Fulltext

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

1,1'-[(2-Bromo-phen-yl)-methyl-ene]-dipyrrolidin-2-one.

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The title compounds, C15H14NO3S 2 (I) and C15H15Br2NO 3S2 (II), are derivatives of Aib (α-aminoisobutyric acid) with thiophene rings substituted at the Cα position. The Cα substitution causes the backbone to assume an extended conformation in the crystal structure. N-H and C-H donors share the thiophene ring π system for X-H⋯π interactions. The packings of the molecules are stabilized by intermolecular N-H⋯O, C-H⋯O, C-H⋯π and C-H⋯Br hydrogen bonds. Br⋯O interactions and a weak dihydrogen bond have also been observed in the crystal structure of II. The packing adopted by II has maximized the number of interactions that are possible. © 2004 Elsevier B.V. All rights reserved.

Journal of Molecular Structure

Optimization of interactions in crystal packing revealed by crystal structures [ethyl 2-(formylamino)-3-thien-2-yl-2-(thien-2-ylmethyl)propanoate and ethyl 3-(5-bromothien-2-yl)-2-[(5-bromothien-2-yl)methyl]-2-(formylamino) propanoate]

1,1′-(4-Methylbenzylidene)bis(5-oxopyrrolidine-2-carboxylic acid)

1,1′-[(2-Bromophenyl)methylene]dipyrrolidin-2-one

Journal	Acta Crystallographica Section E Structure Reports Online
Publisher	International Union of Crystallography (IUCr)
ISSN	16005368
Open Access	No