Witryna26 wrz 2024 · This is a very comprehensive review for its time, summarizing work on directing effects in EAS (e.g. determining which groups are o/p-directing vs. meta-directing, and to what extent they direct/deactivate). Stable carbocations. CLXX. Ethylbenzenium ions and the heptaethylbenzenium ion Witryna9 paź 2024 · Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating (a) – COOH (b) – NO2 asked Oct 8, 2024 in Hydrocarbons …
Explain the directive influence of nitro group in nitrobenzene.
WitrynaThe CH₃ group is activating and o,p-directing. It will direct the incoming nitro group to positions 4 and 6. The Cl atom is deactivating and o,p-directing. It will direct the … Witrynae.g. in the molecule A below where both the carboxyl group (meta-directing) and the chlorine (o/p directing) will guide the incoming electrophile to one of the positions … citizens advice volunteer application form
5 Major Electrophilic Aromatic Substitution Reactions
WitrynaActivating groups (the ones that stabilize the transition state and make the reaction faster) turn out to direct the electrophile to the ortho, para positions, while the deactivating groups put them in the meta position, except for the halogens! Halogens deactivate the aromatic ring, yet they direct the electrophile to the ortho and para … WitrynaSolution. Due to -I effect, it attract the electron toward itself and reduce the electron density on benzene so it deactivates the ring and the substitution takes place at meta position. Due to +R effect, it increase the electron density at ortho and para position by delocalisation of electrons. Resonance effect dominates over inductive effect. WitrynaWhen substitution does occur on an aromatic ring with deactivating group already attached, it tends to occur specifically at the meta position – deactivating groups are … citizens advice watford phone number