Electron withdrawing groups are meta directors with the exception of halogens as they have lone pairs of electrons that are shared with the aromatic ring. Yes, the O C H 3 is an electron …

供电子基又叫electron donating group（EDG） 吸电子基又叫electron withdrawing group（EWG） 是一个通过改变电子密度影响化合物反应活性的重要因素。 可以简单以两种方式来 判断一个 …

2017年9月26日 · Activating and Deactivating Groups in Electrophilic Aromatic Substitution. The rate of electrophilic aromatic substitution (EAS) reactions is greatly affected by the groups …

2018年10月20日 · Facts I know: 1) More the electron density in benzene ring, the faster the reaction. 2) Lone pair on -OCH3 group undergoes resonance and makes ortho-para positions …

2018年1月29日 · Today we’ll describe the two main patterns by which various substituents “ direct ” electrophilic aromatic substitution. In one pattern, substituents direct the reaction to give …

2025年1月4日 · The -OCH3 group has an electronegative oxygen atom, which can withdraw electron density through the inductive effect (-I effect). This makes it act as an electron …

EDG = electron donating group EDG can be recognised by lone pairs on the atom adjacent to the π system, eg: -OCH 3 except - R, -Ar or -vinyl (hyperconjugation, π electrons) EWG = electron …

In organic chemistry, a methoxy group is the functional group consisting of a methyl group bound to oxygen. This alkoxy group has the formula R−O−CH3. On a benzene ring, the Hammett …

An electron-withdrawing group (EWG) is a group or atom that has the ability to draw electron density toward itself and away from other adjacent atoms. [1] This electron density transfer is …

Resonance effect is the delocalization of π electrons. −OCH 3 group has weaker +R group than −OH. In −OH group lone pair of Oxygen are easily available which in −OCH 3 group, the path …