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The most favourable position (indicated ...

The most favourable position (indicated by) for an electrophilic attack is

A

B

C

D

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The correct Answer is:
C
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The -NO_(2) group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When -NO_(2) group is present at ortho or para positions of a leaving group (Nucleofuge) it activates the ring for nucleophilic attack. The reduction of -NO_(2) group by metal in acid causes its reduction to -NH_(2) group and then the ring becomes strongly activated for a electrophilic attack. The strong activation of -NH_(2) group is moderated by its acylation with CH_(3)COCl to -NHAc group. Deacylation is carried out by hydrolysis with H_(3)O^(+) or OH^(-) . The ring alkylation by using RX//AlX_(3) is not possible in presence of -NO_(2) or -NH_(2) group but is possible in presence of -NHAc group. The product (G) is :

The -NO_(2) group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When -NO_(2) group is present at ortho or para positions of a leaving group (Nucleofuge) it activates the ring for nucleophilic attack. The reduction of -NO_(2) group by metal in acid causes its reduction to -NH_(2) group and then the ring becomes strongly activated for a electrophilic attack. The strong activation of -NH_(2) group is moderated by its acylation with CH_(3)COCl to -NHAc group. Deacylation is carried out by hydrolysis with H_(3)O^(+) or OH^(-) . The ring alkylation by using RX//AlX_(3) is not possible in presence of -NO_(2) or -NH_(2) group but is possible in presence of -NHAc group. The product (H) is :

The -NO_(2) group in an aromatic ring deactivates the ortho and para positions for an electrophilic attack. When -NO_(2) group is present at ortho or para positions of a leaving group (Nucleofuge) it activates the ring for nucleophilic attack. The reduction of -NO_(2) group by metal in acid causes its reduction to -NH_(2) group and then the ring becomes strongly activated for a electrophilic attack. The strong activation of -NH_(2) group is moderated by its acylation with CH_(3)COCl to -NHAc group. Deacylation is carried out by hydrolysis with H_(3)O^(+) or OH^(-) . The ring alkylation by using RX//AlX_(3) is not possible in presence of -NO_(2) or -NH_(2) group but is possible in presence of -NHAc group. The product (I) is :

The most favourable product of the following reactions is

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The general electrophilic substitution reaction (replacement of H. by an electrophilic which is an electron deficient species) in aromatic ring is represented as followed. An electrophilic attacks on ortho and para positions which respect to a stronger +m group are present in benzene ring and the electrophilie attacks at meta position with respect to stronger -m group if two -m groups are present in benzene ring. The product of the following reaction is

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RESONANCE ENGLISH-AROMATIC COMPOUNDS-Part - II NSEC
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  2. n-propylamine containing no secondary and tertiary amines as impuritie...

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  3. The most favourable position (indicated by) for an electrophilic attac...

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  4. The compound that on treatment with benzene sulphonyl chloride, forms ...

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  5. The substance that gives a primary amine on hydrolysis is

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  6. Toluene o/p orienting with respect to an electrophilic substitution re...

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  7. The product obtained when 4-hydroxyhenzene sulphonic acid is treated w...

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  8. The most appropriate reaction for the conversion of bromobenzene to be...

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  9. P-bromoanine is prepared from aniline via

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  10. Which one of the following has the highest melting point?

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  11. On bromination, the electron rich phenoxide ion will be attacked most ...

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  12. The sequence of decreasing aromaticity in the above compounds is

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  13. Can the amino group, in the aniline molecule, become meta-directing in...

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  14. Consider the following reactions the major product (Y) of the re...

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  15. In mechanism of Reimer- Riemann reaction, species involves is

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  16. The nitrogen atom in the following cyclic compounds can be removed as ...

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  17. X overset(Mg)underset("ether")toY overset("Dry CO(2))underset(H^(+))to...

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  18. Salicylic acid on treatment with bromine water will give

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  19. The product P obtained through the following sequence of reactions is

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  20. Triethylamine is reacted with a peracid to obtain X. The nitrogen atom...

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