Name 10 Which of the following substituents would be calssified as an activating

Question

Name 10 Which of the following substituents would be calssified as an activating ortho para director in electrophylic aromatic substitution reaction? (a) -COOH b)-OH (c)-C (d)-NO 11. Which structure in the following represents a major intermediate (sigma-complex) in the nitration toluene? CHs NO2 H NO The molecule below is subjected to electrophilic aromatic bromination. What position will the electrophile attack preferentially? H NO2 H NO2 The molecule below is subjected to electrophilic aromatic bromination. What position will the electrophile attack preferentially? CH3 vi COOH (a) i & i (b) iii & vi (c)i& (d) all of them equally

Explanation / Answer

Ans 10 : b) -OH

The hydroxyl groups are ortho para activating in electrophilic aromatic substitution reaction.

They cause the substitutions at ortho and para positions of the aromatic compound.

Ghe halide ions are also ortho para directing but they are deactivating.

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