281.Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.
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282.Write the equation of the reaction of hydrogen iodide with 1-proxypropane.
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283.Write the equation of the reaction of hydrogen iodide with methoxybenzene.
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284.Write the equation of the reaction of hydrogen iodide with benzyl ethyl ether.
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Long Answer Type
285.Explain the fact that in aryl alkyl ethers (i) the alkoxy group activates the benzene ring towards electrophilic substitution and (ii) it directs the incoming substituents to ortho and para positions in benzene ring.
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Short Answer Type
286.Write the mechanism of the reaction of HI with methoxymethane.
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287.Write equations of the following reactions:
Friedal - Crafts reaction - alkylation of anisole.
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Long Answer Type
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