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Dipyridinium dichromate: an achiral compound forming chiral crystals.

Journal article
Authors Anders Lennartson
Mikael Håkansson
Published in Acta crystallographica. Section C, Crystal structure communications
Volume 65
Issue Pt 5
Pages m182-4
ISSN 1600-5759
Publication year 2009
Published at Department of Chemistry
Pages m182-4
Language en
Links dx.doi.org/10.1107/S010827010901146...
Subject categories Chemical Sciences

Abstract

The title compound, (C(5)H(6)N)(2)[Cr(2)O(7)], crystallizes in one of the Sohncke space groups, viz. P2(1)2(1)2(1). Crystallization of dipyridinium dichromate is thus an example of spontaneous formation of a chiral crystal structure from achiral molecules. The dichromate anion adopts a virtually eclipsed achiral conformation, and the crystal structure is held together primarily by N-H...O and C-H...O interactions. The possibility of using dipyridinium dichromate as a reagent in enantioselective synthesis is discussed.

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