顺反异构体

对十四种取代乙烯（XX′CCYY′）顺反异构体进行了DFTB3LYP/631G（d）水平的几何全优化的总能量、总键能的计算。

The fully-optimized molecular geometries and the total energies as well as the total bond energies of cis - and trans-isomers in substituted ethylenes ( XX ′ CCYY ′) have been calculated using DFT method at B3LYP / 6-31G ( d ) and STO-3G lever .

β-胡萝卜素顺反异构体分离鉴定的研究

Study on Separation and Determination of β - Carotene Isomers

色谱法分离与检测丙环唑顺反异构体板形自动检测及闭环控制技术的应用

The application of shape automatic inspection and closed-loop control technique

从光谱发现它有顺反异构体互变现象与变色效应。

Spectroscopic experiment found the cis-trans-tautomerism and the color change effect of basic blue .

双核钼硫原子簇顺反异构体的定域化分子轨道研究

Studies on the Localized Molecular Orbital Properties for Syn and Anti Isomers of Dinuclear Mo-S Clusters

确定溶液配合物顺反异构体构型的新方法

A new method of determining the configuration of geometrical CIS , trans - isomers of complexes in solution

有机农药的红外光谱定量分析研究Ⅵ.杀虫剂灭蚜净的顺反异构体含量测定

Study of Quantitative Analysis of Organic Pesticide by Infrared Spectroscopy ⅵ . The Determination of cis-and trans-Isomers Contents of Insect-Analogue of Phosdrin

同时对产物双键的异构化进行了研究，可利用控制异构化反应条件得到不同比例顺反异构体的产物。

Some studies deal with the olefin isomerization , and diverse proportional cis-and trans-isomerization can be obtained by controling the reaction conditions .

在所选择的操作条件下，氯氰菊酯中α-氯氰菊酯的最小分离度达1.10，胺菊酯、氯菊酯的2对顺反异构体也得到完全分离。

The configuration isomers of tetramethrin and permethrin were seperated completely . The resolution of alpha-cypermethrin from cypermethrin isomers was 1.10 . internal standard was used for quantitation .

具体内容如下：1.构建了离线式离心柱色谱系统，应用该系统获得了一对顺反异构体在离心色谱柱内的谱带展宽情况。

The detail is as follows . 1 . An off-line centrifugal column chromatography system was installed . With this system , the band broadening of two cis-trans-isomers was obtained .

该产物为顺反异构体的混合物（顺反异构体的摩尔比为4∶3），表明重排反应不涉及协同历程。

This product was a mixture of cis and trans isomers with a molar ratio about 4 ∶ 3 , demonstrating that the reaction does not involve a concerted process .

本文从构象分析角度合理解释了1,2二甲基1,2环已二醇顺、反异构体发生Pinacol重排反应的实验结果。

The paper , from the angle of conformational analysis , explains the experimental result of the reaction of pinacol rearrangements of cyclohexan_diol reasonably , which is caused by the cis and trans isomer of 1,2-dimethyl cyclohexan_diol .

灭多威顺、反异构体的电子结构和生物活性

The electronic structures and biological ? Activities of methomyl ′ s cis ? ? and trans ? Isomers

本论文使用添加有甲酸缓冲液的挥发性流动相，建立了反相高效液相色谱分离检测啤酒、麦汁中异α-酸顺/反异构体的方法。

A method of cis / trans stereoisomers of iso - α - acid in beer and wort was established by HPLC using volatile mobile phase adding formic acid buffer .

醋炔诺酮肟顺、反式异构体的分离、鉴别与其抗生育活性的比较

Studies on the separation and identification of anti-and syn-isomers of norethisterone acetate oxime and comparison of their antifertility activity

在碱性条件下，羧基与探针的配位出现顺反两种异构体，随着时间的进行，反式会逐渐向顺式转变。

In alkaline condition , the carboxyl group can coordinate with Os , and the coordinating species have trans and cis isomers , and the trans isomer can convert to cis with time ;

在烯烃的顺式与反式异构体中，处于碳碳双键两端的顶点间的距离是不同的。

The distances among the vertices spaced by the double bond are different in the cis-alkenes from those in its trans-isomers .

路线二和路线三中用苯甲酯保护活泼羟基，并可以分离顺式和反式异构体。

In the second route and third route , the insertion of benzoylation can effectively protect the active methylol radical and may advantageously be employed to facilitate the separation of cis - and trans-forms of the intermediate .

并结合尿素与硫脲的催化反应过程，讨论了氢键复合物两种可能的顺反异构并分析比较了顺反式构象的异构体之间的稳定性大小。

Two possible hydrogen bonding complexes conformations , cis and trans , were discussed and the energy gaps between them were analyzed , in combination with the catalytic reactions .