Acta Cryst. (2005). E61, o1020-o1022  [ doi:10.1107/S1600536805007713 ]

A polymorph of bavachalcone

K. Ravikumar, B. Sridhar, P. Aparna and J. M. Rao

Abstract: The title compound, 1-[2-hydroxy-4-methoxy-5-(3-methylbut-2-enyl)phenyl]-3-(4-hydroxyphenyl)prop-2-en-1-one (also known as bavachalcone), C₂₁H₂₂O₄, is a polymorphic form of a previously reported structure [Bhalla et al. (1968). Tetrahedron Lett. 20, 2401-2406]. The molecules in both polymorphs exhibit nearly identical conformations. In each polymorph, strong intra- and intermolecular hydrogen-bonded chains, involving the hydroxyl groups, are formed. A weak C-HO interaction is seen in the present structure, but was not observed in the previously reported polymorph.

Online 18 March 2005

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