The compound which gives the most stable carbonium ion on dehydration is

Question

The compound which gives the most stable carbonium ion on dehydration is (A) CH 3 CHOHCH 3 (B) ( CH 3)3 COH (C) CH 2= CH - CH 2 CH 2 OH (D) CH 3 OH

Tardigrade Admin · Accepted Answer

The dehydration of tertiary alcohol proceeds via tertiary carbocation intermediate which is most stable.

tertiary alcohol (C H_{3})_{3}) C - O H + H^{+} - H_{2} O 3^{\circ} carbocation more stable (C H_{3})_{3} C +

C H_{3} C H O H C H_{3} + H^{+} - H_{2} O 2^{\circ} carbocation less stable C H_{3} C H + - C H_{3}

C H_{2} = C H - C H_{2} - C H_{2} O H + H - H_{2} O^{+} C H_{2} = C H - 1^{\circ} carbocation (least stable) C H_{2} - C H_{2}^{+}

Decreasing order of stability of carbocation is tertiary

>

secondary

>

primary

>

methyl.

Q. The compound which gives the most stable carbonium ion on dehydration is