Among the following structures, which resonating structure is least stable?
General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question
Among the following structures, which resonating structure is least stable?
- a
Structure A
- b✓
Structure B
- c
Structure C
- d
Structure D
Structure B
When we need to check for the least stable resonating structure, first we look at the octet completion. None of the structures given have complete octet, and all have charge separation. In such scenarios, simply applying the rules is not sufficient. You need to look closely at the structures, how charges are placed, and what makes a stable and unstable arrangement. Look at the structure B, where two positive charges are present on adjacent atoms, which creates a lot of repulsion. This is a very unlikely or unstable arrangement of atoms. This makes the option B the least stable resonating structure.
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from General Organic Chemistry (GOC)) inside The Crucible, our adaptive practice platform.
More JEE Main General Organic Chemistry (GOC) PYQs
Given below are two statements: Statement I: Hyperconjugation is not a permanent effect. Statement II: In general, greater the number of alkyl groups attached to a positively charged C-atom, greater…
Ascending acidity order of the following H atom is:
The set of meta directing functional groups from the following sets is:
Correct carbocation stability order:
How many compounds show inductive, mesomeric AND hyperconjugation effects?