The most stable species among the following is | Chemistry - Friedel–Crafts Acylation (Resonance stabilization of the acylium ion) | SolveeIt

Question

The most stable species among the following is

$CH_3-NH-CH-CH_3$ $\oplus$

$CH_3-CH-CH-CH_3$ $|$ $CH_3$ $\oplus$

$CH_3-C-CH-CH_3$ = Reso + $||$ O $\oplus$ $(-6)$

$CH_3-O-CH-CH_3$ $\oplus$

Answer

Option (3)

Explanation

Solution

Among the given species, option (3) is an acylium ion where the positive charge is delocalized between the carbon and the oxygen by resonance. This resonance stabilization makes it far more stable compared to a simple tertiary carbocation (option 2) or heteroatom–substituted cations (options 1 and 4).

Question: 55) The most stable species among the following is...

Solution