The correct stability order for the following species is

Question

The correct stability order for the following species is (A) (II) > (IV) > (I) > (III) (B) (I) > (II) > (III) > (IV) (C) (II) > (I) > (IV) > (III) (D) (I) > (III) > (II) > (IV)

Tardigrade Admin · Accepted Answer

The σ-electron of C - H bond is delocalised with p-orbitals of π-bond.

Therefore, overall stability order is: I > III > II > IV

Q. The correct stability order for the following species is

(II) > (IV) > (I) > (III)

(I) > (II) > (III) > (IV)

(II) > (I) > (IV) > (III)

(I) > (III) > (II) > (IV)

The $σ$ -electron of $C - H$ bond is delocalised with $p$ -orbitals of $π$ -bond.

Therefore, overall stability order is : $I > III > II > I V$