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Dimorphism and structural modulation in quinoxaline

Sathishkumar, Ranganathan and Mahapatra, Sudarshan and Thakur, Tejender S and Desiraju, Gautam R (2010) Dimorphism and structural modulation in quinoxaline. In: Current Science (Bangalore), 99 (12). pp. 1807-1811.

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The Z' = 1 and Z' = 5 structures of quinoxaline are compared. The nature of the intermolecular interactions in the Z' = 5 structure is studied by means of variable-temperature single-crystal X-ray diffraction. The C-H center dot center dot center dot N and pi ... pi it interactions in these structures are of a stabilizing nature. The high Z' structure has the better interactions, whereas the low Z' structure has the better stability. This trade-off is a recurrent theme in molecular crystals and is a manifestation of the distinction between thermodynamically and kinetically favoured crystal forms.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Crystal structure and engineering;cryocrystallization; hydrogen bond;polymorphism
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 07 Apr 2011 10:09
Last Modified: 07 Apr 2011 10:09
URI: http://eprints.iisc.ac.in/id/eprint/36037

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