Abstract
The title compound, C23H18N2O2·0.5H2O, a derivative of the biologically active compound curcumin, crystallizes with two organic molecules and a solvent water molecule in the asymmetric unit. Each of the two independent molecules is close to being planar (the dihedral angles between the indole ring systems are approximately 9 and 12°) and each exists in the keto–enol form. There is an intramolecular O—H⋯O hydrogen bond between the keto and enol groups. In the crystal, the components interact by way of N—H⋯N, N—H⋯O and O—H⋯O hydrogen bonds.
Highlights
The title compound, C23H18N2O20.5H2O, a derivative of the biologically active compound curcumin, crystallizes with two organic molecules and a solvent water molecule in the asymmetric unit
Each of the two independent molecules is close to being planar and each exists in the keto–enol form
The title compound, (I) (Fig. 1), is new to this class of compounds and crystallizes with two molecules and a solvent water molecule in the asymmetric unit.The two independent molecules are close to being planar as indicated by the torsion angles along the chains with molecule 2 being less planar than molecule 1
Summary
Absolute structure: the absolute structure could not be determined with certainty. H-atom parameters constrained a School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, People’s Republic of China, and bDepartment of Chemistry, Tulane University, New Orleans, LA 70118, USA. R factor = 0.033; wR factor = 0.084; data-to-parameter ratio = 10.2. The title compound, C23H18N2O20.5H2O, a derivative of the biologically active compound curcumin, crystallizes with two organic molecules and a solvent water molecule in the asymmetric unit. Each of the two independent molecules is close to being planar (the dihedral angles between the indole ring systems are approximately 9 and 12 ) and each exists in the keto–enol form. There is an intramolecular O—H O hydrogen bond between the keto and enol groups. The components interact by way of N—H N, N—.
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