In the second paragraph of the image you can see that p-aminobenzenesulfonic acid is more stable.
But according to me, o-aminobenzenesulfonic acid should be more stable as there is six-member cycle of H-bonding.
Am I wrong in my claim?
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added 108 characters in body; edited title
Why isn't ortho isomer of aminobenzenesulfonic acid a major product?
Swastik
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