取代基

网络释义：substituent; substituents; Substituted

网络释义

1.substituent substance 物质 substituent 取代基 substitution 替换 ...

2.substituents substitute 代用品 substituting group 取代基 substitution 替换 ...

5.bulky group异丁烯在Lewis 酸催化下制备.叔丁基为一巨大的取代基( bulky group),脱去时需用酸处理: ROH + B F 3 Et2O C at 2 N HC l e…

6.substitution group substitution reaction 取代反应 substitutional group 取代基 substrate 基质 ...

8.su titutional group ... Glen&SU Group 苏集团 su titutional group 取代基 Jiangsu Su Steel Group Limited 江苏苏钢集团有限公司 ...

1.In a tetrahedral configuration, the substituted groups sre located in two perpendicular planes, the steric effect is much weaker.而在四面体构型中，两对取代基在互为正交的两个平面中，位阻小得多。

2.The invention discloses a preparation method of a benzofuran ketones compound containing indoles substituent groups.一种含吲哚类取代基的苯并呋喃酮类化合物的制造方法。

3.The results suggest that an increase in alkyl group chain substituted on the cation ring correspond with an increase in toxicity.结果表明，随着离子液体阳离子咪唑环上烷基取代基的增大，离子液体对酵母细胞的毒性逐渐增大。

4.The results showed that the substituent in the phenyl ring was advantageous to the formation and maintenance of the liquid crystal phase.结果表明：苯（毒死蜱溶剂）环上取代基，有利于液晶“骨架”的形成及维持；

5.It follow therefore that the steric blocking effects of substituents are reflected in adverse kinetic, rather than thermodynamic factors.由此可以看出，取代基的主本阻碍反应，是反映在违背动力学因素而不是热力学因素。

6.These clusters show different fluxional behaviour and ligands according to various substituent around the metals of osmium.根据羰基配体取代基的不同，该类簇合物中小分子的移动种类及方式也有所不同。

7.The conversion affection of the substituted groups, metal cations on o-amino-diphenyl ether diazonium salt were studied.研究了取代基、金属离子对邻氨基二苯醚重氮盐转化反应的影响。

8.Conclusion The water solubility of the substituent at C-7 position is not main parameter affecting antibacterial activity.结论7-位取代基的水溶性并非决定喹诺酮抗菌活性的主要因素。

9.The method can synthesize paraquat derivatives containing different alkyl substituents by changing the type of ethanol.该方法由于可以通过改变醇的种类，合成出含不同烷基取代基的百草枯衍生物。

10.A new zinc porphyrin with an adenine substituent has been synthesized and characterized by 1HNMR and IR spectroscopy and elemental analysis.合成了一种新型的带有腺嘌呤取代基的锌卟啉并对其进行了表征。