The teaching of stereoisomerism is full of difficulties in organic chemistry and students are often ambiguous to some concepts of them.
详细讨论了立体异构命名中的手性元素和配位体大小的顺序规则 ,并分析了反应过程中反应物构型和反应符号 (R或S)之间的变化关系 ,同时讨论了立体选择性和立体定向性两个概念之间的区
Using propenyl as starting material, the total syntheses of (±)-Cnidilide 1 and its stereoisomer 2 is described through icolated cis- and trans-isomers of products in such reactions as Wittig reaction、Classen rearragement and Grignard reaction successively.
（±）－蛇床酞内酯及其立体异构体的合成王兴明，李绍白，李裕林（兰州大学应用有机国家重点实验室，兰州大学有机化学研究所兰州７３００００）关键词蛇床酞内酯，立体异构体，合成蛇床酞内酯（３Ｓ、３ａＳ、７ａＲ－３－正丁基－３ａ、４、５、７ａ－。
The separation of four stereoisomers of cypermethrin has been studied by capillary gas chromatography.
OV - 1石英毛细管柱 ,FID氢火焰离子化检测器 ,在柱温 2 2 0℃ ,对氯氰菊酯四个立体异构体进行了完全分离。
Four optically pure stereoisomers of 5,6-dimethylidenebicyclo [2.
1]庚-2-醇的四种光学纯立体异构体的合成及其比旋光度[α]_D,并通过它们之间的相互关系,确定了它们的绝对构型。
wo compounds were obtained in preparing 16ξ-bromo-17, 17-ethylene dioxyestra-1, 3, 5 (10)-trien-3-of-acetate from 17, 17-ethytenedioxyestra-1, 3, 5(10)-trien-3 of-acetate in different conditions, and by using physical and chemical methods, these two compounds were proved as stereoisomers with same formula and structure.
通过物理方法和化学方法，证明这２种化合物为立体异构体，并确定了它们的构型。
Objective:To establish a method to separate and determine the four isomers of tramadol hydrochloride in the oral preparations of trans -tramadol hydrochloride.
目的 :建立盐酸反式曲马朵口服制剂中盐酸曲马朵 4种立体异构体的分离测定方法。
The team "stereoisomerism" however, is generally restricted to mirror image isomerism.
然而“立体异构”一词通常只限于镜象异构。
A rather more complex case is that of steric isomerism.
更复杂的情形是立体异构问题。
Stereoisomerism is encountered in the homologous series.
在烯烃同系列中出现了立体异构现象。
Research of the Catalytic Epimerization of L-arabinose;
L-阿拉伯糖的催化立体异构化研究
Progress on the Synthesis and Activity of Hydantocidin and it′s Isomers
Hydantocidin及其立体异构体的合成和生物活性研究进展
A Facile Way to Make and Use an Space Isomeric Molecular Model;
立体异构分子模型的简易制作及其应用
Differ in the way in which the atoms within the molecule are oriented in space are called stereoisomer.
分子中原子在空间定向的方式不同的化合物叫做立体异构体。
Determination of the Four Threonine Isomers and Isoleucine in Mammals;
苏氨酸、异亮氨酸立体异构体的手性色谱分离及其在哺乳动物体内分布的研究
Studies on Constituents of Celastraceae Family and the Esters 2-Stereisoimers of Podophyllotoxin by EI Mass Spectrometry;
卫矛科植物成分、活性和鬼臼羧酸酯类2位立体异构体EI-MS质谱研究
partial epimerization
部分差向(立体)异构化作用
Study on the Relation of Heteromorphism Transform and Reproduction--Through the Visual Angle of the Transformation from Plane Works to Solid Products;
论异形转换是否构成复制——以“平面到立体”为视角
Analyzing the Conceptual Differences between the Western and Chinese Clothing from the Plane and 3-Dimensional Constructers of Clothing;
从服装的平面结构与立体结构浅析中西方服装观念差异
Stereoselective Effects of Doxazosin and Its Enantiomers between Blood Pressure and Intra-urethral Pressure in Anesthetized Rabbits;
多沙唑嗪及其光学异构体对兔血压及尿道压的立体选择性
Stereoselectivity Analysis of Propranolol Enantiomer and Study Function of GBLP;
普萘洛尔对映异构体的立体选择性分析与GBLP功能研究
anisodesmic structure
(晶体) 异键结构
Construction of Fruit Specific Expression Ipt Gene and Establishment of Transformation System in Actinidia Deliciosa;
猕猴桃果实特异表达ipt基因的构建与转化体系建立的研究
Study on the Relationship between the Tumor Microvascular Architecture Phenotype Heterogeneity and the MSCT Pulmonary Perfusion Imaging in Non-Small Cell Lung Cancer;
非小细胞肺癌微血管构筑立体表型异质性与MSCT肺灌注成像的关系
They are said to be conformational isomers also called conformers.
它们叫做构象异构体，也叫做异象体。
