7a,13b-Ethylenedioxy-1-hydroxy-7a,13b-dihydrodibenzo[a,kl]xanthene

Yue-Peng Cai, Duan-Min Tan, Cheng-Yong Su, Miao-Fen Liao, Bei-Sheng Kang, Zun-Le Xu
2001 Acta Crystallographica Section E  
Key indicators Single-crystal X-ray study T = 294 K Mean '(C±C) = 0.002 A Ê R factor = 0.045 wR factor = 0.136 Data-to-parameter ratio = 19.3 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2001 International Union of Crystallography Printed in Great Britain ± all rights reserved The title compound, C 22 H 16 O 4 , is composed of six rings bridged via two chiral C atoms. A couple of enantiomers cocrystallize to give a
more » ... ze to give a racemic crystal in which the OÐHÁ Á ÁO hydrogen bonds connect the enantiomers alternately to form a chain. %±% interactions play an important role in crystal packing to control the parallel arrangement of the chains.
doi:10.1107/s1600536801007772 fatcat:bsm4gdcfhnaknolev7pywsa6je