Single Choice

If $$ R =CH_3 $$ the correct order of basic character of $$ 1^0 $$ amine , $$ 2^0 $$ amine , $$ 3^0 $$ amine and $$ NH_3 $$ in aqueous medium is :

A$$ 1^0 > 2^0 > 3^0 > NH_3 $$
B$$ 2^0 > 3^0 > 1^0 > NH_3 $$
C$$ 2^0 > 1^0 > 3^0 > NH_3 $$
Correct Answer
D$$ 2^0 > 1^0 > NH_3 > 3^0 $$

Solution

In gaseous or nonpolar solvent, the basic order is $$ 3^0 > 2^0 >1^0> NH_3 $$

As the number of alkyl group increases the basicity increases.

However, in aqueous medium solvation of ammonium ion with water should be considered.

Thus the order of basicity of amines in aqueous medium is: ( If R group is $$CH_3$$)

$$ 2^0 > 1^0 >3^0> NH_3 $$

Option C is correct.

SIMILAR QUESTIONS

Organic Compounds Containing Nitrogen

An organic compound 'A' on treatment with $$NH_{3}$$ gives 'B', which on heating gives 'C'. 'C', when treated with $$Br_{2}$$ in the presence of KOH, produces ethylamine. Compound 'A' is:

Organic Compounds Containing Nitrogen

Find out a qualitative test for proteins, fats and oils, amino acids. Test any fruit juice, saliva, sweat and urine for them.

Organic Compounds Containing Nitrogen

How will you covert: Ethanamine into methanamine

Organic Compounds Containing Nitrogen

Which of the following amides will give ethylamine on reaction with sodium hypobromide?

Organic Compounds Containing Nitrogen

If $$ R = C_2H_5 $$ the correct order of basic character of the above amines in aqueous medium is :

Organic Compounds Containing Nitrogen

If $$ R =Me_2CH-$$ (isopropyl) , the correct order of basic character of the above amines in an aqueous medium is :

Organic Compounds Containing Nitrogen

If $$ R = Me_3C- (t -butyl) $$the correct order of basic character of the above amines in aqueous medium is :

Organic Compounds Containing Nitrogen

For any value of R, the correct order of basic character of the above amines in gaseous phase of nonpolar solvent is :

Organic Compounds Containing Nitrogen

Which of the following is converted into an alcohol on treatement with $$ HNO_{2} $$

Organic Compounds Containing Nitrogen

Indicate which nitrogen compound amongst the following would undergo Hofmann's reaction ( i.e. reaction with $$Br_{2}$$ and strong KOH) to furnish the primary amine ($$R-NH_{2}$$)

Contact Details