JEE PYQ: General Organic Chemistry Question 23
Question 23 - 2020 (05 Sep Shift 1)
The increasing order of basicity of the following compounds is:
(A) Pyridine (B) Imidazole (with $sp^3$ N-H, delocalised L.P.) (C) Pyrrole ($sp^2$ hyb. N atom, localised L.P.) (D) Pyrazole (with $sp^2$ N, localised L.P. with partial negative character)
(1) (A) < (B) < (C) < (D)
(2) (B) < (A) < (D) < (C)
(3) (D) < (A) < (B) < (C)
(4) (B) < (A) < (C) < (D)
Show Answer
Answer: (2)
Solution
(A) Pyridine: $sp^2$ hyb. N atom (localised L.P.). (B) Imidazole: $sp^2$ hyb. N atom (delocalised L.P.). (C) Pyrrole: $sp^2$ hyb. N atom (localised L.P.). (D) Pyrazole: localised L.P. with partial negative charge. Thus, increasing order of basicity is (B) < (A) < (D) < (C).
BETA
