JEE Main Chemistry question
A symmetrical compound of the form CH_3-O-Ar-O-Ar-O-Ar-O-CH_3 (a chain of three aromatic rings linked by ether oxygens, capped at both ends by a methyl ether) is treated with excess concentrated HI. How many moles of HI are consumed?
Answer: 2
Solution
The two internal aryl–O–aryl linkages are between two aromatic rings and are not cleaved by HI (neither aryl–O bond here is activated for nucleophilic substitution), but each of the two
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