Why tert. Amines donot undergo acylation reaction ?

Why tert. Amines donot undergo acylation reaction ?
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1 Answer

Answer :

Ans.-- Tert. Amines donot undergo acylation reaction because they donot have Nattached to H- atom. 
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Can tertiary amines undergo acetylation reactions ? Explain.

Description : Can tertiary amines undergo acetylation reactions ? Explain. 

Last Answer : For an amine to undergo acetylation, it should have a replaceable hydrogen atom. Tertiary amines cannot undergo acetylation reactions because these do not have replaceable hydrogen atom.

What is the major organic product of the reaction between benzene and isobutyl chloride in the presence of AlCl3? (a) tert-butylbenzene (b) isobutylbenzene (c) n-butylbenzene (d) chlorobenzene

Description : What is the major organic product of the reaction between benzene and isobutyl chloride in the presence of AlCl3? (a) tert-butylbenzene (b) isobutylbenzene (c) n-butylbenzene (d) chlorobenzene

Last Answer : tert-butylbenzene

Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.

Description : Which of the following is not a correct statement concerning the FriedelCrafts acylation of benzene? (a) An alkyl group substitutes for a hydrogen. (b) The benzene ring attacks an acylium ion. (c) The acylium ion is resonance stabilized. (d) The acylium ion is often produced from an acyl chloride.

Last Answer : An alkyl group substitutes for a hydrogen

The diazonium salts are the reaction products of the reaction of nitrous acid with (a) primary aliphatic amines (b) primary aromatic amines (c) secondary aliphatic amines (d) secondary aromatic amines

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A compound with molecular formula `C_(6)H_(10)O_(4)` on acylation with acetic anhydride gives a compound with molecular formula `C_(12)H_(18)O_(8)`. H

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A compound with molecular formula `C_(6)H_(10)O_(4)` on acylation with acetic anhydride gives a compound with molecular formula `C_(12)H_(18)O_(8)`. H

Description : A compound with molecular formula `C_(6)H_(10)O_(4)` on acylation with acetic anhydride gives a compound with molecular formula `C_(12)H_(18)O_(8)`. H

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Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?

Description : Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?

Last Answer : Ans. To prepare di tert-butyl ether by Williamson's synthesis, we need tert-butyl bromide and Sodium tertiary butoxide. Since tert-butyl bromide being 3°-alkyl halide prefers to ... rather than substitution, therefore the product obtained is isobutylene rather than ditertiary butyl ether.

Hydroboration-oxidation of propene gives : (a) Isopropyl alcohol (b) n-Propyl alcohol (c) Isobutyl alcohol (d) tert-Butyl alcohol

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Last Answer : Acetone

Which compound reacts most rapidly by an SN1 mechanism? (a) Methyl chloride(b) Isopropyl chloride(c) Ethyl chloride(d) tert-Butyl chloride

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Last Answer : tert-Butyl chloride

2-Methylpropene reacts with HBr to give (a) tert-Butyl bromide (b) Isobutane (c) n-Butyl bromide (d) None of these

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Optical isomerism is shown by (a) n-Butyl chloride (b) sec-Butyl chloride (c) tert-Butyl chloride(d) Isobutyl chloride

Description : Optical isomerism is shown by (a) n-Butyl chloride (b) sec-Butyl chloride (c) tert-Butyl chloride (d) Isobutyl chloride

Last Answer : sec-Butyl chloride

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In IPv4, which field or bit value unambiguously identifies thedatagram as a fragment? A) Donot fragment bit ?0 B) More Fragment bit ?0 C) Fragment offset = 1000 D) noneof the above

Description : In IPv4, which field or bit value unambiguously identifies thedatagram as a fragment? A) Donot fragment bit ?0 B) More Fragment bit ?0 C) Fragment offset = 1000 D) noneof the above

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The following is correct about antipsychotic drugs except: A. They only control symptoms of schizophrenia without affecting the basic disorder B. Combination of two or more antipsychotic drugs is more efficacious than any single drug C. In treating psychosis high potency drugs are preferred over low potency drugs D. They donot produce dependence

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Disease modifying antirheumatic drugs are indicated in rheumatoid arthritis: A. In place of NSAIDs in patients who donot tolerate the latter B. Along with NSAIDs in patients with progressive disease C. Only when NSAIDs fail to afford symptomatic relief D. In all patients irrespective of disease status/ concurrent medication

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Last Answer : B. Along with NSAIDs in patients with progressive disease

Selective COX-2 inhibitors differ from nonselective COX-1/COX-2 inhibitors in that they: A. Are antiinflammatory but not analgesic B. Donot bring down fever C. Have no renal effects D. Do not inhibit platelet aggregation

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Of the following reactions, how many reaction, are used for the preparation of amines? (a) `R-C-=N overset(LiAIh_(4))rarr` (b) `R-overset(O)overset(||

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Of the following amines how many can give carbyl amine reaction?

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The hyperconjugative stabilities of tert-butyl cation and `2`-butene, respectively, are due to

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The major product obtained when tert- butyl bromide is heated with sodium ethoxide is

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Which of the following alkenes when passed through conc. `H_(2)SO_(4)` followed by hydrolysis with boiling water would give tert-butyl alcohol

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Aromatic primary amines are not prepared by gabrial phthalimide synthesis. Why?

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Why are amines always less acidic than comparable alcohols?

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Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.

Description : Give reasons:--- a. Primary amines are more basic than ammonia. b . Sec. amines are more basic than pr.amines.

Last Answer : Ans— a. In pr. Amines, alkyl group increases electron density on the N-atom making it more basic than ammo b. In sec. amine, there are two alkyl groups increase electron density on N-atom more than N-atom in pr. amines in which there is one alkyl group. 

When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form

Description : When ammonia is added to an alkyl halide, in the presence of base : (a) primary amines form (b) amides form (c) nitrated alkyl halides form (d) quaternary ammonium salts form

Last Answer : primary amines form

Carbylamine test is given by (a) Primary amines (b) Secondary amines (c) Tertiary amines (d) None of these

Description : Carbylamine test is given by (a) Primary amines (b) Secondary amines (c) Tertiary amines (d) None of these

Last Answer : Primary amines

Which of the following amines react with nitrous acid to form nitrosoamine? (a) Ethylamine (b) Triethylamine (c) Diethylamine (d) Isopropylamine

Description : Which of the following amines react with nitrous acid to form nitrosoamine? (a) Ethylamine (b) Triethylamine (c) Diethylamine (d) Isopropylamine

Last Answer : Diethylamine

Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Description : Aliphatic primary amines react with cold nitrous acid to form (a) Alcohols (b) Diazonium salts (c) Nitriles (d) Nitroalkanes

Last Answer : Alcohols

Alkyl halides react with ammonia in the presence of base to form : (a) primary amines(b) nitrated alkyl halides(c) amides(d) quaternary ammonium salts

Description : Alkyl halides react with ammonia in the presence of base to form : (a) primary amines (b) nitrated alkyl halides (c) amides (d) quaternary ammonium salts

Last Answer : primary amines

Amines are generally classified as (a) Weak acids (b) Strong acids (c) Weak bases (d) Strong bases

Description : Amines are generally classified as (a) Weak acids (b) Strong acids (c) Weak bases (d) Strong bases

Last Answer : Weak bases

Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react with acid chlorides to give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Description : Which of the following statements is false about secondary amines? (a) They react with chloroform and NaOH to form isocyanides. (b) They can be prepared by reduction of isocyanides. (c) They react ... give substituted amides. (d) They react with ice-cold nitrous acid to give nitrosamine (yellow oil)

Last Answer : They react with chloroform and NaOH to form isocyanides.

Which of the following statements is false about primary amines? (a) They can be prepared by reduction of nitriles with LiAlH4. (b) They do not form salts with acids(c) They react with ice-cold nitrous acid to form nitrogen gas.(d) They are basic and soluble in water

Description : Which of the following statements is false about primary amines? (a) They can be prepared by reduction of nitriles with LiAlH4. (b) They do not form salts with acids (c) They react with ice-cold nitrous acid to form nitrogen gas. (d) They are basic and soluble in water

Last Answer : They do not form salts with acids

Lucas test is used to determine the type of (a) alcohols (b) acids (c) amines (d) carbohydrates

Description : Lucas test is used to determine the type of (a) alcohols (b) acids (c) amines (d) carbohydrates

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Show that F cannot undergo Disproportionation reaction?

Description : Show that F cannot undergo Disproportionation reaction?

Last Answer : Ans. F is most electronegative element and cannot possess three oxidation states. Hence it cannot undergo disproportionation reactions.

What type of aldehydes undergo Cannizaro reaction ?

Description : What type of aldehydes undergo Cannizaro reaction ?

Last Answer : Ans. Aromatic and aliphatic aldehydes which do not contain hydrogens. 

Acid chlorides undergo reduction to the corresponding aldehydes on treatment with hydrogen in the presence of Pd/BaSO4. This reaction is called : (a) Clemmensen reduction (b) Rosenmund reduction (c) Wolf-Kishner reduction (d) None of these

Description : Acid chlorides undergo reduction to the corresponding aldehydes on treatment with hydrogen in the presence of Pd/BaSO4. This reaction is called : (a) Clemmensen reduction (b) Rosenmund reduction (c) Wolf-Kishner reduction (d) None of these

Last Answer : Rosenmund reduction

Which of the following compounds will undergo an SN2 reaction most readily? (a) (CH3)3CCH2I (b) (CH3)3CCl (c) (CH3)2CHI (d) (CH3)2CHCH2CH2CH2I

Description : Which of the following compounds will undergo an SN2 reaction most readily? (a) (CH3)3CCH2I (b) (CH3)3CCl (c) (CH3)2CHI (d) (CH3)2CHCH2CH2CH2I

Last Answer : (CH3)2CHCH2CH2CH2I

How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :-

Description : How many amines are possible with the molecular formula `C_(4)H_(11)N` (structural isomers only) :-

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n-propylamine containing no secondary and tertiary amines as impurities is prepared by

Description : n-propylamine containing no secondary and tertiary amines as impurities is prepared by

Last Answer : n-propylamine containing no secondary and tertiary amines as impurities is prepared by A. Hoffmann ... n-propylchloride with ammonia D. none of these

Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is

Description : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is

Last Answer : Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in ... reaction D. Reaction with `NH_(3)`

The strongest base in aqueous solution among the following amines is :

Description : The strongest base in aqueous solution among the following amines is :

Last Answer : The strongest base in aqueous solution among the following amines is : A. N,N- ... N-ethylethanamine C. M-methylmethanamine D. ethanamine

Which of the following amines cannot be prepared by path-I?

Description : Which of the following amines cannot be prepared by path-I?

Last Answer : Which of the following amines cannot be prepared by path-I? A. B. C. D.

Which of the following amines reacts most rapidly with

Description : Which of the following amines reacts most rapidly with

Last Answer : Which of the following amines reacts most rapidly with A. B. C. D.

The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following

Description : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann elimination. Which of the following

Last Answer : The nitrogan atom in each of the following tertiary amines may be removed as trimethyl amine by repeated Hoffmann ... to accomplish this? A. B. C. D.

Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:

Description : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions:

Last Answer : Only one of the following amines will lose its nitrogen atom as trimethyl amine by repeated Hofmann elimination reactions: A. B. C. D.

Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`?

Description : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`?

Last Answer : Which of the following amines form `N-` nitroso derivative when treated with `NaNO_(2)` and `HCI`? A. `CH_(3)NH_(2)` B. C. D.

Which of the following amines will react with cyclohexanone to give enamine?

Description : Which of the following amines will react with cyclohexanone to give enamine?

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