%0 Journal Article
%T CRYSTAL STRUCTURE OF PICRIAFELTARRAGENIN EPOXY COMPOUND<br>苦玄参环氧甙元(Ⅰ)的晶体结构测定
%A HAN FU-SEN
%A ZHENG QI-TAI
%A FAN HAI-FU
%A <br>韩福森
%A 郑启泰
%A 范海福
%J 物理学报
%D 1981
%I 
%X Single crystals of picriafeltarragenin epoxy compound, C30H44O6, belong to space group P(212121) with lattice parameters a =28.373 (9)?, b=10.667 (5)?, c = 9.115 (4)? and 4 molecules in the unit cell. The intensities of 2890 independent reflectionsau collected using the PW-1100 fourcircle diffractometer. The structure was solved with MULTAN 78 program and refined to a final R = 0.084 by block diagonal least square method. Positions of all the hydrogen atoms were obtained from the difference Fourier synthesis. The shortest distance between two molecules is 3.5?.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=CAA8ACFF70626F773D1787394E451CB3&yid=AA64127AB7DEB65D&vid=340AC2BF8E7AB4FD&iid=5D311CA918CA9A03&sid=39B73ADA6F3DD05F&eid=1529CB0C2A6A7E90&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=0