The correct trend of acidic nature of the following alkynes is

Question

The correct trend of acidic nature of the following alkynes is (A) CH ≡ CH > CH3 - C ≡ CH > CH3C ≡ CCH3 (B) CH3 - C ≡ CH > CH ≡ CH > CH3C ≡ CCH3 (C) CH3C ≡ CCH3 > CH3 - C ≡ CH > CH ≡ CH (D) CH ≡ CH > CH3C ≡ CCH3 > CH3C ≡ CH

Tardigrade Admin · Accepted Answer

As stability of conjugate base is more, greater is the acidic strength Stability of conjugate base

C H \equiv C^{-} > (+ I) C H_{3} - C \equiv C^{-} > C H_{3} - C \equiv C - C H_{2}^{⊖}

Hence, also terminal

C

is

s p^{3}

hybridize so ability to donates

H^{+}

is very less. Acidic strength order

C H \equiv C H > C H_{3} - C \equiv C H > C H_{3} - C \equiv C - C H_{3}

Q. The correct trend of acidic nature of the following alkynes is

$C H \equiv C H > C H_{3} - C \equiv C H > C H_{3} C \equiv CC H_{3}$

$C H_{3} - C \equiv C H > C H \equiv C H > C H_{3} C \equiv CC H_{3}$

$C H_{3} C \equiv CC H_{3} > C H_{3} - C \equiv C H > C H \equiv C H$

$C H \equiv C H > C H_{3} C \equiv CC H_{3} > C H_{3} C \equiv C H$

Q. The correct trend of acidic nature of the following alkynes is

CH≡CH>CH3​−C≡CH>CH3​C≡CCH3​

CH3​−C≡CH>CH≡CH>CH3​C≡CCH3​

CH3​C≡CCH3​>CH3​−C≡CH>CH≡CH

CH≡CH>CH3​C≡CCH3​>CH3​C≡CH

$C H \equiv C H > C H_{3} - C \equiv C H > C H_{3} C \equiv CC H_{3}$

$C H_{3} - C \equiv C H > C H \equiv C H > C H_{3} C \equiv CC H_{3}$

$C H_{3} C \equiv CC H_{3} > C H_{3} - C \equiv C H > C H \equiv C H$

$C H \equiv C H > C H_{3} C \equiv CC H_{3} > C H_{3} C \equiv C H$