Reaction of phenol with pthalic anhydride
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When Phenol is heated with phthalic anhydride in presence of conc H2SO4, Phenolphthalein is formed
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In the presence of conc. sulfuric acid, one molecule of phthalic anhydride reacts with two molecules of phenol to form a molecule of phenolphthalein. A molecule of water is lost in this reaction. Thus, this is a condensation reaction.
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