(E)-1-(5-Hy-droxy-2,2-dimethyl-2H-chromen-6-yl)-3-(3,4,5-trimeth-oxy-phen-yl)prop-2-en-1-one

• Published in: Acta crystallographica. Section E, Structure reports online Structure reports online, 2011-05, Vol.67 (Pt 5), p.o1265-o1265
• Main Authors: Wang, Guang-Cheng, Yang, Ying-Hong
• Format: Article
• Language: English
• Subjects: Organic Papers
• ISSN: 1600-5368; 1600-5368
• DOI: 10.1107/S1600536811015236

The title compound, C(23)H(24)O(6), crystallizes with two independent mol-ecules (A and B) in the asymmetric unit. The dihedral angles between the benzopyran ring and the α,β-unsaturated ketone unit and between the α,β-unsaturated ketone group and the benzene ring are 9.4 (10) and 12.96 (13)°, respectively, in mol-ecule A and 1.40 (17) and 4.44 (17)°, respectively, in mol-ecule B. The two meth-oxy groups at the meta positions of the benzene ring are close to being coplanar with the ring [C-O-C-C = 6.2 (3) and -1.4 (3)° in mol-ecule A and -4.2 (4) and 3.7 (3)° in mol-ecule B], whereas the third meth-oxy group, at the para position, is (+)-anti-clinal with respect to the benzene ring [C-O-C-C = 81.7 (3)°] in mol-ecule A and is (-)-synclinal with respect to the benzene ring [C-O-C-C = -103.2 (3)°] in mol-ecule B. In both independent mol-ecules, the hy-droxy group is involved in an intra-molecular O-H⋯O hydrogen bond.