Cha, Joo Hwan Pae, Ae Nim Lee, Jae Kyun Cho, Yong Seo 2024-01-20T15:32:54Z 2024-01-20T15:32:54Z 2021-09-04 2012-02 1600-5368 https://pubs.kist.re.kr/handle/201004/129623 In the title compound, C22H22O4, the two cyclohexenone rings adopt half-chair conformations, 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 by 0.142 (2) and 0.287 (2)angstrom, respectively. In the crystal, weak C-H center dot center dot center dot O hydrogen bonds link molecules into chains running parallel to the a axis. English WILEY-BLACKWELL 9-[(E)-2-(2-Methoxyphenyl)ethenyl]-3,4,5,6,7,9-hexahydro-2H-xanthene-1,8 -dione Article 10.1107/S1600536812001419 1 ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, v.68, pp.O454 - U1108 ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE 68 O454 U1108 scie scopus 000301059200094 2-s2.0-84863065783 Crystallography Crystallography Article data-to-parameter ratio = 16.8 mean σ(C-C) = 0.002 ？ R factor = 0.044 single-crystal X-ray study T = 296 K wR factor = 0.136