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Arrange the following in increasing order of their basic strength: C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH - Chemistry

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प्रश्न

Arrange the following in increasing order of their basic strength:

C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH

दीर्घउत्तर

उत्तर

Considering the inductive effect of alkyl groups, NH3, C2H5NH2, and (C2H5)2NH can be arranged in the increasing order of their basic strengths as:

NH3 < C2H5NH2 < (C2H5)2NH

Again, C6H5NH2 has proton acceptability less than NH3. Thus, we have:

C6H5NH2 < NH3 < C2H5NH2 < (C2H5)2NH

Due to the −I effect of C6H5 group, the electron density on the N-atom in C6H5CH2NH2 is lower than that on the N-atom in C2H5NH2, but more than that in NH3. Therefore, the given compounds can be arranged in the order of their basic strengths as:

C6H5NH< NH3 < C6H5CH2NH2 < C2H5NH2 < (C2H5)2NH

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अध्याय 13: Amines - Intext Questions [पृष्ठ ३९६]

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एनसीईआरटी Chemistry [English] Class 12
अध्याय 13 Amines
Intext Questions | Q 4.1 | पृष्ठ ३९६

संबंधित प्रश्न

Identify the weakest base amongst the following :

(a) p- methoxyaniline

(b) o-toluidine

(c) benzene - 1, 4 - diamine

(d) 4 - aminobenzoic acid


Give reason for the following:

Primary amines have higher boiling point than tertiary amines.


Arrange the following in increasing order of their basic strength :


  1. Write structures of different isomeric amines corresponding to the molecular formula C4H11N.
  2. Write the IUPAC names of all the isomers.
  3. What type of isomerism is exhibited by different pairs of amines?

How will you convert Cl−(CH2)4−Cl into hexan-1, 6-diamine?


Arrange the following in increasing order of their basic strength:

C2H5NH2, (C2H5)2NH, (C2H5)3N, C6H5NH2


Account for the following:

Gabriel phthalimide synthesis is preferred for synthesising primary amines.


Arrange the following:

In increasing order of boiling point:

C2H5OH, (CH3)2NH, C2H5NH2


Write a short note on ammonolysis.


Accomplish the following conversion:

Benzene to m-bromophenol


Illustrate the following reactions giving suitable example in each case 

Ammonolysis


Answer in one sentence.

Arrange the following amines in increasing order of boiling points.

n-propylamine, ethylmethyl amine, trimethylamine.


Tertiary amines have lowest boiling points because ________________


Arrange the following compounds in increasing order of their boiling points.

Ethyl alcohol, Ethyl amine, Ethanoic acid, Ethane


The CORRECT decreasing order of solubility in water will be ____________.


Which among the following has the highest boiling point?


Among the following isomeric amines, an amine having highest boiling point is:


Account for the following:

N-ethylethanamine boils at 329.3 K and butanamine boils at 350.8 K, although both are isomeric in nature.


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