Write order of electron density in aromatic ring of following compounds.
A
IV>III>II>I
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B
I>II>III>IV
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C
IV>II>I>III
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D
III>IV>II>I
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Solution
The correct option is DIII>IV>II>I −NH2 and −NHCOCH3 are activating groups. They increase the electron density through strong electron donating resonance effect.
−COOEt and −OCOEt are deactivating groups. They decrease the electron density through strong electron withdrawing resonance effect.