Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
 
Polymorphism of 4′-Dimethylamino-3-hydroxyflavone
Kazuyuki HinoKiyohiko NakajimaMiyoko KawaharaIssui KiyotaHiroshi Sekiya
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2011 Volume 84 Issue 11 Pages 1234-1236

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Abstract

Structures of two polymorphic crystals 1a and 1b of 4′-dimethylamino-3-hydroxyflavone (1) have been determined. Each crystal has intermolecular hydrogen-bonded dimers with the adjacent molecule. The dimeric structure in crystal 1a is nearly planar, whereas that in crystal 1b is slightly bent with respect to the chromane moieties. In both crystals there is a stacking structure of the dimers linked by π–π interactions.

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© 2011 The Chemical Society of Japan
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