Arrange following carbocation in the decreasing order of stability (i) C textH3- overset+CH-CH3 (ii) CH3- overset+CH-O-CH3 (iii) CH3- overset+CH-CO-CH3

Question

Arrange following carbocation in the decreasing order of stability (i) C textH3- overset+CH-CH3 (ii) CH3- overset+CH-O-CH3 (iii) CH3- overset+CH-CO-CH3 (A) (.iii.)>(.ii.)>(.i.) (B) (.i.)>(.ii.)>(.iii.) (C) (.ii.)>(.i.)>(.iii.) (D) (.i.) < (.ii.) < (.iii.)

Tardigrade Admin · Accepted Answer

Carbocation are stabilised by back bonding and electron donating groups (EDG) while destabilised by electrons withdrawing groups (EWG).

C H_{3} - C + H - O - C H_{3}

(back bonding) >

C H_{3} - C + H - C H_{3}

(EDG) >

C H_{3} - C + H - CO - C H_{3}

(EWG)

Q. Arrange following carbocation in the decreasing order of stability
(i) $C H_{3} - C + H - C H_{3}$
(ii) $C H_{3} - C + H - O - C H_{3}$
(iii) $C H_{3} - C + H - CO - C H_{3}$

$(iii) > (ii) > (i)$

$(i) > (ii) > (iii)$

$(ii) > (i) > (iii)$

$(i) < (ii) < (iii)$

Carbocation are stabilised by back bonding and electron donating groups (EDG) while destabilised by electrons withdrawing groups (EWG).
$C H_{3} - C + H - O - C H_{3}$ (back bonding) > $C H_{3} - C + H - C H_{3}$ (EDG) > $C H_{3} - C + H - CO - C H_{3}$ (EWG)

Q. Arrange following carbocation in the decreasing order of stability (i) CH3​−C+H−CH3​ (ii) CH3​−C+H−O−CH3​ (iii) CH3​−C+H−CO−CH3​

(iii)>(ii)>(i)

(i)>(ii)>(iii)

(ii)>(i)>(iii)

(i)<(ii)<(iii)