Q14 / 90 · JEE Main 2021 (16 Mar Shift 2) · Chemistry

Which of the following is least basic?

  • A
    CH3CON¨HC2H5
  • B
    C2H53N¨
  • Correct answer
    C
    CH3CO2N¨H
  • D
    C2H52N¨H

Solution

For the given compounds: 

(1) Figure; L.P. on Nitrogen is delocalised.

(2) Figure; L.P. on Nitrogen is localised.

(3) Figure; 

L.P. on Nitrogen is delocalised due to conjugation with both Figure 

(Hence least basic)

(4) CH3-CH2-N¨H-CH2-CH3; L.P. on Nitrogen is localised.

Hence, the correct answer is option: 'C'.

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