Crystal structures of 6-chloroindan-1-one and 6-bromoindan-1-one exhibit different intermolecular packing interactions

The two title compounds are analogs of 1-indanone that are substituted at the 6-position with chlorine and bromine. Although very similar in molecular structure, the crystal structures are not isomorphous and reveal that 6-chloroindan-1-one, C9H7ClO (I), and 6-bromoindan-1-one, C9H7BrO (II), exhibit...

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Bibliographic Details
Main Authors: Alessio Caruso, Benjamin Blair, Joseph M. Tanski
Format: Article
Language:English
Published: International Union of Crystallography 2016-11-01
Series:Acta Crystallographica Section E: Crystallographic Communications
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Online Access:http://scripts.iucr.org/cgi-bin/paper?S2056989016015371
Description
Summary:The two title compounds are analogs of 1-indanone that are substituted at the 6-position with chlorine and bromine. Although very similar in molecular structure, the crystal structures are not isomorphous and reveal that 6-chloroindan-1-one, C9H7ClO (I), and 6-bromoindan-1-one, C9H7BrO (II), exhibit unique intermolecular packing motifs. The molecules of the chloro analog (I) pack with a herringbone packing motif of C—H...O interactions, whereas the bromo derivative (II) packs with offset face-to-face π-stacking, C—H...O, C—H...Br and Br...O interactions. Compound (II) was refined as a two-component non-merohedral twin, BASF 0.0762 (5).
ISSN:2056-9890