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Concomitant Polymorphism in 3-Acetylcoumarin: Role of Weak C-H \cdot\cdot\cdot O and C-H \cdot\cdot\cdot \pi Interactions

Munshi, Parthapratim and Venugopala, KN and Jayashree, BS and Row, Tayur Guru N (2004) Concomitant Polymorphism in 3-Acetylcoumarin: Role of Weak C-H \cdot\cdot\cdot O and C-H \cdot\cdot\cdot \pi Interactions. In: Crystal Growth and Design, 4 (6). pp. 1105-1107.

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Abstract

An analysis of structural features associated with polymorphism in 3-acetylcoumarin has been made in terms of morphology, infrared spectroscopy, crystal structure, powder X-ray diffraction, and differential scanning calorimetric measurements. The appearance of concomitant polymorphs is found to depend on the crystallization temperature in the 1:1 chloroform/hexane solvent system. C-H \cdot\cdot\cdot O and C-H\cdot\cdot\cdot \pi interactions stabilize one form in a head to head configuration, while only C-H\cdot\cdot\cdot O interactions stabilize the other in a head to tail configuration of the molecules in the crystal lattice.

Item Type: Journal Article
Additional Information: The copyright for this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 26 Oct 2005
Last Modified: 27 Aug 2008 11:30
URI: http://eprints.iisc.ernet.in/id/eprint/3801

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