Ncert Exercises & Solutions

Match the intermediates given in Column-I with their probable structure in Column-II.

A. $\to$ (1) B. $\to$ (1) C. $\to$ (2)

Column I	Column II	Explanation
A. Free radical	Trigonal planar	Free radicals are formed by homolytic fission e.g., $\overset{o}{C} H_{3}$ hybridization sp²
B. Carbocation	Trigonal planar	Formed by heterolytic fission when carbon is attached to a more electronegative atom e.g., $\overset{+}{C} H_{3}$ hybridization sp²
C. Carbanion	Pyramidal	Formed by heterolytic fission when carbon is attached to more electropositive atom e.g., ${CH}_{3}^{-}$ hybridization sp³

Hint: Free radicals are formed by homolytic fission e.g., $\stackrel{\circ}{\mathrm{C}} \mathrm{H}_3$ hybridization sp².