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- Electron withdrawing groups and acidity - Chemistry Stack Exchange
Yes and no, with more electron withdrawing groups at ortho and para positions would certainly increase acidity but other factors do play a role For example, In trinitrobenzoic acid here the two $\ce {NO2}$ at ortho positions are very bulky and due to steric repulsion rotate the $\ce {COOH}$ group thus making the compound non planar due to which there will be no more resonance thus, reducing
- Amine group - electron donating or withdrawing group?
When the amine group plays the role of electron donating group through conjugation, its inductive withdrawing effect (still existing) is weaker and masked by the first effect
- Electron Withdrawing vs Electron Donating groups - Wyzant
Electron Withdrawing vs Electron Donating groups-The way that this can be done is by drawing resonance structures If the resonance structure ends up taking the electrons out of the benzene ring (for instance, a ketone bonded to the benzene ring), then the group is an electron withdrawing group If it ends up with the electrons going into the benzene ring, then it is an electron donating group
- Effect of electron-donating and electron-withdrawing groups on the C=O bond
For electron withdrawing groups, the the logic is the same just that the reasoning is opposite If a halogen X was attached to the carbonyl then it would exert an electron withdrawing effect on the C=O C atom, giving it a delta positive charge This makes breaking the C=O bond difficult as it would then intensify the positive charge on the C atom
- Are alkyl groups electron withdrawing? - Chemistry Stack Exchange
This recently published article claims that alkyl groups are infact electron withdrawing Most introductory organic chemistry textbooks seem to contradict this observation This question addresses a
- Why do electron donating groups stabilize free radicals?
Hence, they get stabilised by electron releasing groups, which "quench" the requirement of electrons for the free radicals This can happen via induction, or by resonance,or even by hyperconjugation (which is basically the same as resonance) I hope this answers your question
- activating and deactivating groups and directing effect
I believe that if we ignore the inductive effects of the substituents for the time being, then the electron-donating group (which donates electrons via resonance effect) would manage to activate a few positions in one or more resonating structures, and the electron-withdrawing group can only take up this delocalized pair of $\pi$ electrons when
- NMR: Most deshielded protons (electron withdrawal)
The correlation between electron withdrawing groups and shielding deshielding is a strong rule of thumb, but can become complicated with aromatic systems and competing electronegativities of substituents
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