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Aromatic Compounds

Correct order...

Question

Correct order of resonance energy of following compounds:

A

II > I > IV > III

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B

II > IV > I > III

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C

I > II > III > IV

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D

II > I > III > IV

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Solution

The correct option is D II > I > III > IV

I, II, III are aromatic due to delocalisation so more resonance energy than IV. Due to delocalisation -
Ist get positive character on nitrogen
IInd get positive character on sulfur.
IIIrd get positive character on oxygen.
E. N : Oxygen >Nitrogen > Sulphur
So resonance energy II > I > III > IV.

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Aromatic Compounds

Standard XII Chemistry

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