Home

Citation: Hou Yong-Kang, Fu Heng. How to Specify Origin and Enantiamorph with General Reflections[J]. Acta Physico-Chimica Sinica, ;1989, 5(01): 107-109. doi: 10.3866/PKU.WHXB19890123 shu

How to Specify Origin and Enantiamorph with General Reflections

Hou Yong-Kang ,
Fu Heng

1.
Institute of Chemistry, Academia Sinica

Received Date: 11 May 1987
Available Online: 15 February 1989

For non-centrosymmetric crystal structures, it is usually uses as many specila refletions as possible to define origin and enantiamorph. But in some cases, special reflections may be not enough or may be not in od quality to specify origin and enantiamorph so questions about specifying origin and enantiamorph with general reflections are discussed in this paper. Origin definition reflections of any space groups are differentiated into absolute freedoms and relative freedoms so that the problem of assigning values to the general refection phases for specifying origin is able to be solved. The concept of freedom is also used in enantiamorph specification. Two cases about enantiamorph specification relection related to or not related to origin definition refections are disecussed respectively. In both cases enantiamorph specification can be realized through two steps: (1) Chosing the signs of a certain number of structurral invariants (2) On the basis of step one, making restrictins to the amplitudes and phase signs of the invariant's component reflections.
1. [1]
  Xilin Zhao , Xingyu Tu , Zongxuan Li , Rui Dong , Bo Jiang , Zhiwei Miao . Research Progress in Enantioselective Synthesis of Axial Chiral Compounds. University Chemistry, 2024, 39(11): 158-173. doi: 10.12461/PKU.DXHX202403106
2. [2]
  Haiying Wang , Andrew C.-H. Sue . How to Visually Identify Homochiral Crystals. University Chemistry, 2024, 39(3): 78-85. doi: 10.3866/PKU.DXHX202309004
3. [3]
  Zhengjie Miao , Chuanqiang Zhou , Yuanyuan Ren , Xiangping Xu , Ju Xie , Jie Han . Hierarchical chiral nanoribbons of achiral oligoaniline: temperature induced helicity inversion and enantioselective crystallization application. Acta Physico-Chimica Sinica, 2026, 42(10): 100256-0. doi: 10.1016/j.actphy.2026.100256
4. [4]
  Yinuo Wang , Siran Wang , Yilong Zhao , Dazhen Xu . Selective Synthesis of Diarylmethyl Anilines and Triarylmethanes via Multicomponent Reactions: Introduce a Comprehensive Experiment of Organic Chemistry. University Chemistry, 2024, 39(8): 324-330. doi: 10.3866/PKU.DXHX202401063
5. [5]
  Xiaolei Jiang , Fangdong Hu . Exploring the Mirror World in Organic Chemistry: the Teaching Design of “Enantiomers” from the Perspective of Curriculum and Ideological Education. University Chemistry, 2024, 39(10): 174-181. doi: 10.3866/PKU.DXHX202402052
6. [6]
  Gonglan Ye , Xia Yin , Feng Xu , Peng Yang , Yingpeng Wu , Huilong Fei . Innovations in “Four-in-One” Inorganic Chemistry Education. University Chemistry, 2024, 39(8): 136-141. doi: 10.3866/PKU.DXHX202401071
7. [7]
  Zhexue Lu , Ping Wu , Huihui Li , Libai Wen . 四“味”一体的无机及分析化学课程思政. University Chemistry, 2025, 40(6): 333-340. doi: 10.12461/PKU.DXHX202405196
8. [8]
  Zhongyan Cao , Shengnan Jin , Yuxia Wang , Yiyi Chen , Xianqiang Kong , Yuanqing Xu . Advances in Highly Selective Reactions Involving Phenol Derivatives as Aryl Radical Precursors. University Chemistry, 2025, 40(4): 245-252. doi: 10.12461/PKU.DXHX202405186
9. [9]
  Jiakun BAI , Ting XU , Lu ZHANG , Jiang PENG , Yuqiang LI , Junhui JIA . A red-emitting fluorescent probe with a large Stokes shift for selective detection of hypochlorous acid. Chinese Journal of Inorganic Chemistry, 2024, 40(6): 1095-1104. doi: 10.11862/CJIC.20240002
10. [10]
  Guanghuan Chen , Yinghua Wang , Jinhui Ming , Jian Ling , Zhihui Shao , Chongdao Lu , Yong Shi . 香芹酮β硼化：一个可用于展示反应选择性的教学实验. University Chemistry, 2026, 41(5): 101-108. doi: 10.12461/PKU.DXHX202510042
11. [11]
  Yuyao Chen , Qirui Zou , Bowen Liu , Fuyun Li , Ao Zhang , Xiuwei Fan . NBO分析在研究取代芳烃亲电取代反应区域选择性和活性中的应用. University Chemistry, 2026, 41(9): 442-448. doi: 10.12461/PKU.DXHX202509012
12. [12]
  Chengbin Gong , Guona Zhang , Qian Tang , Hong Lei , Ling Kong , Wenshan Ren . Development of a Practical Teaching System for the Applied Chemistry Major Emphasizing “Industry-Education Integration, University-Enterprise Cooperation, and Multi-Dimensional Combination”. University Chemistry, 2024, 39(6): 220-225. doi: 10.3866/PKU.DXHX202309104
13. [13]
  Jianfu Zhang , Wei Bai , Juan Hou , Chenyang Zou . Reform and Practice of “Project-Patent- Scholarly Paper” Integrated Teaching Mode: Taking “Polymer Processing” Course as an Example. University Chemistry, 2025, 40(4): 138-146. doi: 10.12461/PKU.DXHX202408138
14. [14]
  Zhixin Zhou , Ran Chen , Yuanjian Zhang , Songqin Liu , Yanfei Shen . 分析化学课程本硕一体化的全英文教学改革. University Chemistry, 2025, 40(6): 64-70. doi: 10.12461/PKU.DXHX202407093
15. [15]
  Junjie Zhang , Yue Wang , Qiuhan Wu , Ruquan Shen , Han Liu , Xinhua Duan . Preparation and Selective Separation of Lightweight Magnetic Molecularly Imprinted Polymers for Trace Tetracycline Detection in Milk. University Chemistry, 2024, 39(5): 251-257. doi: 10.3866/PKU.DXHX202311084
16. [16]
  Jun LUO , Baoshu LIU , Yunchang ZHANG , Bingkai WANG , Beibei GUO , Lan SHE , Tianheng CHEN . Europium(Ⅲ) metal-organic framework as a fluorescent probe for selectively and sensitively sensing Pb²⁺ in aqueous solution. Chinese Journal of Inorganic Chemistry, 2024, 40(12): 2438-2444. doi: 10.11862/CJIC.20240240
17. [17]
  Baitong Wei , Jinxin Guo , Xigong Liu , Rongxiu Zhu , Lei Liu . Theoretical Study on the Structure, Stability of Hydrocarbon Free Radicals and Selectivity of Alkane Chlorination Reaction. University Chemistry, 2025, 40(3): 402-407. doi: 10.12461/PKU.DXHX202406003
18. [18]
  Jingkun Yu , Xue Yong , Ang Cao , Siyu Lu . Bi-Layer Single Atom Catalysts Boosted Nitrate-to-Ammonia Electroreduction with High Activity and Selectivity. Acta Physico-Chimica Sinica, 2024, 40(6): 2307015-0. doi: 10.3866/PKU.WHXB202307015
19. [19]
  Junzhe Liu , Kaihui Lv , Haohao Fu , Ting Man , Yu Wu , Aijuan Han , Junfeng Liu . 光催化界的“斜杠青年”：卤氧化铋家族的十八般武艺. University Chemistry, 2026, 41(9): 217-221. doi: 10.12461/PKU.DXHX202509010
20. [20]
  Yonghui ZHOU , Rujun HUANG , Dongchao YAO , Aiwei ZHANG , Yuhang SUN , Zhujun CHEN , Baisong ZHU , Youxuan ZHENG . Synthesis and photoelectric properties of fluorescence materials with electron donor-acceptor structures based on quinoxaline and pyridinopyrazine, carbazole, and diphenylamine derivatives. Chinese Journal of Inorganic Chemistry, 2024, 40(4): 701-712. doi: 10.11862/CJIC.20230373

Get Citation

PDF

XML

Metrics

PDF Downloads(1869)
Abstract views(2942)
HTML views(86)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return