Heating phthalic anhydride and concentrated s | vedclass

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(B) Phenolphthalein is synthesized by the condensation reaction of phthalic anhydride with two equivalents of phenol in the presence of an acid cataly

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Phenol

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(B) Phenolphthalein is synthesized by the condensation reaction of phthalic anhydride with two equivalents of phenol in the presence of an acid catalyst like concentrated $H_2SO_4$. The reaction is a type of Friedel-Crafts acylation/alkylation process. The chemical equation is: $	ext{Phthalic anhydride} + 2 	ext{Phenol} \xrightarrow{conc. H_2SO_4} 	ext{Phenolphthalein} + H_2O$.

Heating phthalic anhydride and concentrated sulfuric acid with which of the following yields phenolphthalein?

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