Yu, B.-Y. Lee, J.K. Cho, Y.S. Min, S.-J. Woo, J.C. 2024-01-20T11:32:03Z 2024-01-20T11:32:03Z 2021-09-02 2013-10 1600-5368 https://pubs.kist.re.kr/handle/201004/127636 In the title compound, C25H27ClO3, each of the cyclohexenone rings adopts an envelope conformation, whereas the six-membered pyran ring adopts a flattened boat conformation, with the O and methine C atoms deviating from the plane of the other four atoms. The C=C double bond is in the trans conformation. In the crystal, weak C - H？O hydrogen bonds link the molecules into chains running parallel to the b axis. English 9-[(E)-2-(4-Chlorophenyl)ethenyl]-3,3,6,6-tetramethyl-2,3,4,5,6,7,8, 9-octahydro-1H-xanthene-1,8-dione Article 10.1107/S1600536813025026 1 Acta Crystallographica Section E: Structure Reports Online, v.69, no.10 Acta Crystallographica Section E: Structure Reports Online 69 10 scopus 2-s2.0-84885156549 Article 1H-xanthene-1,8-dione Crystal data The C=C double bond the b axis