例句 释义: 全部,吸电子基团,是吸电子基团,拉电子基 更多例句筛选 1. Previous reports have been limited to activated substrates wherein the vinyl chloride is conjugated to an electron-withdrawing group. 先前的报告都局限于活化后的底物,其中氯乙烯被共轭到一个吸电子基团。 emuch.net隐私...
electron withdrawing 吸电子 withdrawing n. 撤退,拉出,抽出动词withdraw的现在分词形式 Electron 埃雷克特龙镁合金 electron n.[C] 电子 group n.[C] 1.组,群,批,类,簇 2.集团 v.[I] 1.(使)成群、成组,聚集 2.将…分类,把…分组 in group n. 内集团 methyl(group) 甲基 ginger group...
简明 electron withdrawing group 释义 [化] 吸电子基团
electron withdrawing 吸电子 withdrawing n. 撤退,拉出,抽出动词withdraw的现在分词形式 Electron 埃雷克特龙镁合金 electron n.[C] 电子 group n.[C] 1.组,群,批,类,簇 2.集团 v.[I] 1.(使)成群、成组,聚集 2.将…分类,把…分组 in group n. 内集团 methyl(group) 甲基 ginger group...
When this center is an electron rich or an anion with the presence of the substituent that has a stabilizing effect.Examples of electron withdrawing groups are An or (otherwise called electron donating groups or EDG) releases electrons into a reaction center and as such stabilizes electron ...
electron withdrawing group 英 [ɪˈlektrɒn wɪðˈdrɔːɪŋ ɡruːp] 美 [ɪˈlektrɑːn wɪðˈdrɔːɪŋ ɡruːp]网络 吸电子基团; 吸电子基...
electron withdrawing group 【化】 吸电子基团 to withdraw 提款 withdraw deposit 提款,提取存款 withdraw court 【法】 退庭 相似单词 withdraw v.[T] 1. 抽回;拉开;移开 2. 收回;取回;提取 3. 取消,撤回;撤销 4. 撤退,撤离;使退出 v.[I] 1. 撤退,撤离;退出;离开 2. 收回所说的话(或所做...
沪江词库精选electron-withdrawing是什么意思、英语单词推荐 吸电子 相似短语 electron withdrawing group 吸电子基 electron withdrawing group 【化】 吸电子基团 withdrawing roll 拉辊(连铸) withdrawing device 拉轮器,抽出装置 permit for withdrawing 【经】 (税关的)出库许可证 withdrawing room phr. ...
However, if you add an electron withdrawing group, that's going to pull electron density out of the ring, making it less nucleophilic. That's going to deactivate the ring towards future reactions. That means the second reaction will be more difficult to perform than the firs...
The first examples are presented of Diels-Alder cycloadditions using, as dienes, 1-unsubstituted 2(1H)pyridones substituted by an electron-withdrawing group in the ring. Furthermore, the Diels-Alder adduct obtained is a potentially valuable synthetic intermediate leading to new heterocyclic ring ...