A. Renuga Parameswari, B. Devipriya, S. J. Jenniefer
Mar 1, 2012
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Influential Citations
11
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Journal
Journal of Chemical Crystallography
Abstract
The title compound 5-Hydroxy-1,7-bis-(4-hydroxy-3-methoxy-phenyl)-hepta-1,6-dien-3-one crystallizes in orthorhombic space group Pca21 with two molecules in the asymmetric unit. The unit cell parameters are: a = 35.5368(8), b = 7.7799(2), c = 12.6796(3) Å, Dcalc = 1.396 Mgm−3, V = 3505.6(2) Å3 and Z = 8. The two aromatic rings in both the molecules are found almost coplanar, their dihedral angles are 18.8° and 13.8°, respectively. The molecular packing is stabilized by strong O–H···O and C–H···O types of hydrogen bonding interactions. The keto and enol groups form an strong O–H···O intra-molecular interaction in both molecules of asymmetric unit. The molecular alignment in the crystal forming a staircase type of stacking through cross link intermolecular interactions.Graphical Abstract[Graphical abstract: Crystal structure analysis of 5-Hydroxy-1,7-bis-(4-hydroxy-3-methoxy-phenyl)-hepta-1,6-dien-3-one crystallizes in orthorhombic space group Pca21, with two molecules in the asymmetric unit and it is a new polymorph of curcumin. The unit cell parameters are : a = 35.5368(8), b = 7.7799(2), c = 12.6796(3) Å, Dcalc = 1.396 Mgm−3, V = 3505.6(2) Å3 and Z = 8. The molecular packing is stabilized by O–H···O and C–H···O types of hydrogen bonding interactions.]