9-(2-Hydroxy-6-oxocyclohex-1-en-1-yl)-2,3,4,9-tetrahydro-1H-xanthen-1-one
oleh: Shaaban K. Mohamed, Mehmet Akkurt, Antar A. Abdelhamid, Aamer Saeed, Ulrich Flörke
| Format: | Article |
|---|---|
| Diterbitkan: | International Union of Crystallography 2013-04-01 |
Deskripsi
In the xanthene ring system in the title compound, C19H18O4, the 4H-pyran ring has a maximum deviation of 0.110 (2) Å from planarity and the cyclohexene ring exhibits a puckered conformation [puckering parameters QT = 0.452 (3) Å, θ = 57.0 (4) and ϕ = 131.7 (4)°]. The cyclohexene ring attached to the xanthene system adopts an envelope conformation, with the middle of the three methylene C atoms as the flap atom. In the crystal, O—H...O and C—H...O hydrogen bonds form infinite chains of R12(6) ring motifs along [100] with the xanthene groups arranged in an alternating zigzag manner.