Abstract
The title compound, C16H10Cl2O3, is almost planar with a dihedral angle of 0.14 (16)° between the benzodioxole ring system and the dichlorobenzene ring that are bridged by the olefinic double bond. The corresponding value reported for the monoclinic polymorph is [5.57 (9)° (Lokeshwariet al.(2017).IUCrData,2, x170103). The carbonyl group lies almost in the plane of the olefinic double bond and is twisted slightly from the benzodioxole ring plane. In the crystal, the molecules are linked by weak C—H...O and C—H...Cl hydrogen bonds, forming a chain propagating along theb-axis direction.
Highlights
The title compound, C16H10Cl2O3, is almost planar with a dihedral angle of 0.14 (16) between the benzodioxole ring system and the dichlorobenzene ring that are bridged by the olefinic double bond
The molecules are linked by weak C—HÁ Á ÁO and C—HÁ Á ÁCl hydrogen bonds, forming a chain propagating along the b-axis direction
As part of our ongoing work on such molecules (Rajendraprasad et al, 2017; Naveen et al, 2016a,b), we report here the synthesis and crystal structure of the title compound
Summary
Chalcones and their derivatives exhibit a plethora of biological applications that include use as antioxidants, or antifungal, antibacterial and cardioprotective agents. It is a polymorph having been reported previously in the monoclinic space-group P21/c (Lokeshwari et al, 2017). The molecule is nearly planar as seen by the dihedral angle of 0.14 (16) between the benzodioxole ring system and the dichlorobenzene ring; these are bridged by an olefinic double bond that adopts an E conformation. The corresponding dihedral angle reported for the monoclinic polymorph is 5.57 (9) (Lokeshwari et al, 2017). The trans conformation of the C C double bond in the central enone group is confirmed by the C—
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