Question

A canonical structure will be more stable if

• A. it includes cyclic delocalization of $(4n+2)$ $\pi -$ electrons than if it involves acyclic delocalization of $(4n+2)$ $\pi -$ electrons.
• B. it includes cyclic delocalization $\left(4n\right)$ $\pi -$ electrons than if it involves acyclic delocalization of $\left(4n\right)$ $\pi -$ electrons
• C. positive charge is on more electronegative atom than if positive charge is on less electronegative atom provided atoms are in same period.
• D. negative charge is on more electronegative atom than if negative charge is on less electronegative atom provided atoms are in same period.

Answer 1

The correct option is A it includes cyclic delocalization of $(4n+2)$ $\pi -$ electrons than if it involves acyclic delocalization of $(4n+2)$ $\pi -$ electrons.

A canonical structure will be more stable of i)negative charge is on more electronegative atom and positive charge on more electropositive atom.

ii)If it increases cyclic delocalisation of $(4n+2)\pi$ electrons than if it involves acyclic delocalisation of $(4n+2)\pi$ electrons.

A is the correct answer.