Which is the most preferred position for electrophilic substitution reaction in naphthalene?

Reaction Examples. Note: Naphthalene can undergo electrophilic aromatic substitution

electrophilic aromatic substitution

Electrophilic aromatic substitution is an organic reaction in which an atom that is attached to an aromatic system (usually hydrogen) is replaced by an electrophile.

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Electrophilic aromatic substitution - Wikipedia

(EAS) reactions similar to benzene and generally prefers to substitute at the alpha position.

Why attack occurs at alpha position in naphthalene?

Electrophilic substitution reaction in naphthalene is quite similar to benzene reaction. The alpha position is more stabilized than the beta position. The carbocation formed at an alpha position after the attack of an electrophile is much more stabilized by its resonance than the second position.

Which position is more reactive in naphthalene?

Orientation in the substitution of naphthalene can be complex, although the 1 position is the most reactive.

At which position of electrophilic substitution reaction is most preferred?

Explanation: Electrophilic substitution reaction at position the 3-position is preferred over attack at 2 and 4-position because the intermediate found by electrophilic addition at 3-position is more stable as it will have 3-resonating structure and none of will have positive charge on N.

Why the 1st position of naphthalene is more reactive than 2nd position explain giving mechanism?

As shown in above figures when electrophile attacks on position 1 it can form two resonating structures while when attack on 2^nd position there is no resonating structure possible. Thus, attack on 1^st position makes more stable intermediate compared to 2^nd position attack.

Naphthalene || Electrophilic Substitution || Mechanism || By TUC || By NIKHIL Sharma || NEET JEE

Why naphthalene is more reactive than benzene?

Answer: So naphthalene is more reactive compared to single ringed benzene . Naphthalene has two aromatic rings, but only 10 pi electrons (rather than the twelve electrons that it would prefer). This means that naphthalene has less aromatic stability than two isolated benzene rings would have.

Which is more aromatic naphthalene or anthracene?

There are three aromatic rings in Anthracene. Therefore the order of resonance energy as per the benzene ring in the decreasing order is : Benzene > Naphthalene > Phenanthrene > Anthracene.

On which position on the ring and undergoes electrophilic substitution reaction?

The 3-position is the most electron-rich C-atom in the pyridine ring. This is why electrophilic substitution reactions (if they work) take place in the 3-position.

Which of the following is the Favourable position for electrophilic aromatic substitution SE in these molecule?

Thus, the para- position B is favourable for the electrophilic aromatic substitution reaction. Therefore, the position where electrophilic aromatic substitution (EAS) is most favourable is option (B)- B.

At which position the electrophilic aromatic substitution takes place in pyridine?

Electrophilic substitutions

Substitutions usually occur at the 3-position, which is the most electron-rich carbon atom in the ring and is, therefore, more susceptible to an electrophilic addition.

How many compounds are more reactive than benzene towards electrophilic aromatic substitution reaction napthalene anthracene Phenanthracene pyrrole?

Among the given compounds, only five compounds are more reactive than benzene towards electrophilic aromatic substitution reaction.

Which compound has highest tendency of halogenation through aromatic electrophilic substitution?

In series of activating group OH comes first then OCH3, hence, phenol is most reactive towards electrophilic substitution reaction.

Does naphthalene undergo addition reactions?

Naphthalene also undergoes addition reactions more readily than benzene. It is reduced by sodium and amyl alcohol to tetra-hydronaphthalene, whereas benzene is unattacked by the reagent. The product tetralin is also obtained by the partial catalytic hydrogenation of naphthalene.

Why alpha position in naphthalene is more reactive than beta position?

Why is an alpha position in naphthalene more reactive than a beta position? When an alpha position is attacked by an electrophile, we get more number of resonating structures than by its attack at the beta position. Therefore, we get more of the alpha product during ArSE reactions.

Why electrophilic substitution reaction occurs slowly in nitrobenzene than benzene?

Nitrobenzene, C₆H₅NO₂, undergoes the reaction millions of times more slowly. These observations are consistent with the role of the aromatic as a nucleophile in this reaction. Substituents that draw electron density away from the aromatic ring slow the reaction down.

What will be the attacking electrophile in this reaction?

What will be the attacking electrophile in this reaction? Explanation: In halogenation of benzene ring halonium ion (Cl⁺) will attack at benzene ring. 4.

Which position are very reactive in phenanthrene?

Phenanthrene can also be obtained photochemically from certain diarylethenes. Reactions of phenanthrene typically occur at the 9 and 10 positions, including: Organic oxidation to phenanthrenequinone with chromic acid. Organic reduction to 9,10-dihydrophenanthrene with hydrogen gas and raney nickel.

Which of the following is not associated with electrophilic aromatic substitution?

Answer Expert Verified

The Formation of Benzene is not associated with electrophilic substitution. Explanation: It is because it is a type of electrophilic aromatic substitution reaction. It generally proceeds by substitution by an acyl, nitro or sulpho group.

How many groups are op directing in electrophilic aromatic substitution?

There are 2 ortho positions, 2 meta positions and 1 para position on benzene when a group is attached to it.

Why electrophilic substitution takes place more readily in aromatic amines than benzene?

Solution : Due to resonance, the electrons on the N-atom in aniline are delocalized over the benzene ring. As a result, the electron density on the benzene ring increases as compared to benzene itself. In other words, aniline gets activated and hence electrophilic substitution occurs more readily in aniline.

Which of the following is most activating in electrophilic aromatic substitution?

NH₂ is the most activating in electrophilic aromatic substitution. (Option D) In electrophilic aromatic substitution, NH₂ is the most activating. It is an activating group because it is a powerful electron-donating group.

Which position is preferred for nucleophilic substitution reactions in Nitroarenes?

Nitrobenzene undergoes electophilic substitution at m - position, while nucleophilic substitution occurs ar o - and p - position. Because.

Which has more aromatic character benzene or naphthalene?

Benzene has six pi electrons for its single aromatic ring. Naphthalene has two aromatic rings, but only 10 pi electrons (rather than the twelve electrons that it would prefer). This means that naphthalene has less aromatic stability than two isolated benzene rings would have.

Why naphthalene is aromatic?

As we are getting a whole number from, 4nπ+2 formula for naphthalene, so naphthalene is aromatic. Therefore, the naphthalene is an aromatic compound according to Huckel's rule because it has 4nπ+2 delocalised electrons. Note: Pi bonds are known as delocalized bonds. Pi bonds cause the resonance.

Which is more stable naphthalene or anthracene?

Here resonance energy per benzene ring decreases from 36 Kcal/mol for benzene to 30.5 Kcal/mol for naphthalene, 30.3 Kcal/mol for phenanthene and 28Kcal/mol for anthracene. Hence, order of stability (or RE): Benzene > Phenanthrene ~ Naphthalene > Anthracene.