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Why does acylation of -NH(2) of aniline ...

Why does acylation of `-NH_(2)` of aniline reduces its activating effect?

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Acrlation of `-NH_(2)` of aniline reduces its activity due to resonance of lone pair of nitrogen towards the carbonyl gorup hence `o-, p^(-)` directive influence of amino group get disturbed.
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Give reasons for the following (a) Acetylation of aniline reduces its activation effect. (b) CH_(3)NH_(2) is more basic than C_(6)H_(5)NH_(2) . (c) Although -NH_(2) is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Give reasons for the following (a) Acetylation of aniline reduces its activation effect. (b) CH_(3)NH_(2) is more basiic than C_(6)H_(5)NH_(2) . (c) Although -NH_(2) is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline.

Why does a molecule of Ne_(2) fail to exist ?

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 :

-NH_(2) group is a strong activator towards aromatic electrophilic substiution reaction. Activating capability of -NH_(2) group can be reduced by treating with

In acidic medium Zn reduces nitrate ion ot NH_(4)^(+) ion according to the reaction underset("(unbalanced)")(Zn+NO_(3)^(-))rarrZn^(2+)+NH_(4)^(+)+H_(2)O How many moles of HCl are required to reduce half a mole of NaNO_(3) completely? Assume the availability of sufficient Zn.

Why is NH_(2) group of aniline acetylated before carrying our nitration

Which of the following side chain reaction/s can be used to reduce the acitivating group such as (-OH) or (-NH_(2)) .

NCERT EXEMPLAR ENGLISH-AMINES-SATQ
  1. What is Hinsberg reagent?

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  2. Why is benzene diazonium chloride not stored and is used immediately a...

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  3. Why does acylation of -NH(2) of aniline reduces its activating effect?

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  4. Explain why MeNH(2) is stronger base than MeOH?

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  5. What is the role of pyridine in the acelation reaction of amines?

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  6. Under the reaction condition (acidic, basic) the coupling reaction of ...

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  7. Predict the product of reaciton for aniline with bromine in non-polar...

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  8. Arraange the following compounds in increasing order of dipole moment?...

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  9. What is the structure and IUPAC name of the compound, allyl amine?

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  10. Write down the IUPAC name of

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  11. A compound Z with molecular formula C(3)H(9)N reacts with C(6)H(5)SO(2...

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  12. A primary amine, RNH(2) can be reacted with CH(3)-X to get secondary a...

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  13. Complete the following reaction

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  14. Why is aniline soluble in aqueous HCl?

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  15. Suggest a route by which of the following conversion can be accomplish...

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  16. Identfy A and B in the following reactions.

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  17. How will you carry out the follwing conversion? (i) Toluene -p-tolui...

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  18. Write following conversions (i) Nitrobenzene-Acetanilide (ii) Acet...

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  19. A solution contains 1g mol. Each of p-toluene diazonium chloride and p...

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  20. How will you bring out the following conversion?

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