Organic Chemistry Basics 2 Question 26
26. The correct stability order for the following species is
(III)
(II)
(a) (II) $>$ (IV) $>$ (I) $>$ (III)
(b) (I) $>$ (II) $>$ (III) $>$ (IV)
(c) (II) $>$ (I) $>$ (IV) $>$ (III)
(d) (I) $>$ (III) $>$ (II) $>$ (IV)
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Solution:
- The $\sigma$-electron of $\mathrm{C}-\mathrm{H}$ bond is delocalised with $p$-orbitals of $\pi$-bond.
II
Therefore, overall stability order is : I > III > II > IV
