%0 Journal Article
%T ELIMINATION OF THE FOUR-FOLD AMBIGUITIES DUE TO THE ARRANGEMENT OF HEAVY ATOMS BY MAKING USE OF THE DIRECT METHOD<br>用直接法处理由重原子引起的四重解
%A FAN HAI-FU
%A ZHENG QI-TAI
%A <br>范海福
%A 郑启泰
%J 物理学报
%D 1980
%I 
%X Single crystals of 4-Bromowuweizichun B, C23H27O7Br, belong to the space group P212121 with four molecules per unit cell. Since both the Y and Z parameters of the bromine atom are close to 1/4, either the heavy atom method or the Patterson method would lead to a four-fold ambiguity for each light atom. Consequently the structure analysis could not proceed by the usual way. By making use of the method proposed by one of the authors, the ambiguity was easily resolved and the correct structure obtained.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=4772BB7852827064D09A4EDCC58752B1&yid=E56875464B1C0EC1&vid=771469D9D58C34FF&iid=F3090AE9B60B7ED1&sid=AFB21040E5F48417&eid=0B75D2720F0065BE&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0