MCQ
The electrophile, ${E^ \oplus }$ attacks the benzene ring to generate the intermediate $\sigma -$complex. Of the following, which $\sigma -$ complex is lowest energy ?
- A
- ✓
- C
- D
✓
Answer
Correct option: B.
b
the complex formed is with benzene where as in other cases it is formed with nitrobenzene with $-N O_{2}$ group in different position $(O-, m-, p-) .$ The complex formed with nitrobenzene in any position of $-N O_{2}$ group is less stable than the complex formed with benzene.
the complex formed is with benzene where as in other cases it is formed with nitrobenzene with $-N O_{2}$ group in different position $(O-, m-, p-) .$ The complex formed with nitrobenzene in any position of $-N O_{2}$ group is less stable than the complex formed with benzene.
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