1) pyrethroid stereoisomers

拟菊酯立体异构体
2) isomers of cypermethrin

氯氰菊酯异构体
1.
The property of DB-1 and HP-5 column for separating isomers of cypermethrin was compared in different gas chromatography conditions such as column flow velocity and column temperature.
比较了DB-1和HP-5石英毛细管柱在不同柱流速、柱温下对氯氰菊酯异构体的分离效果,表明采用DB-1石英毛细管柱(30m×0。
3) stereoisomerism
[英][,steriəuai'sɔmərizəm] [美][,stɛrɪoaɪ'sɑmərɪzṃ]

立体异构
1.
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
4) stereoisomer
[英][,steriəu'aisəmə] [美][,stɛrɪo'aɪsəmɚ]

立体异构体
1.
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-。
5) stereoisomers

立体异构体
1.
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。
2.
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。
3.
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。
6) Isomer
[英]['aisəmə] [美]['aɪsəmɚ]

立体异构体
1.
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。
补充资料:顺-反式异构体(cistrans isomer),1,2,4异构体
分子式:
CAS号:
性质:又称顺-反式异构体(cistrans isomer),1,2,4异构体或1,2,6异构体(1,2,4 isomer;1,2,6 isomer)。八面体配位化合物中,六个配体分别为3个A(如图中Cl:A1,A2,A3)和3个B(如图中Py:B1,B2,B3)(图暂缺)。当三个相同的配体中的两个(如A1与A3或B1与B3)互为反式,第三个(如A2或B2)与这两个A1与A3或B1与B3)均为顺式,这样的排布的异构体即为经式异构体。
CAS号:
性质:又称顺-反式异构体(cistrans isomer),1,2,4异构体或1,2,6异构体(1,2,4 isomer;1,2,6 isomer)。八面体配位化合物中,六个配体分别为3个A(如图中Cl:A1,A2,A3)和3个B(如图中Py:B1,B2,B3)(图暂缺)。当三个相同的配体中的两个(如A1与A3或B1与B3)互为反式,第三个(如A2或B2)与这两个A1与A3或B1与B3)均为顺式,这样的排布的异构体即为经式异构体。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条