To selectively synthesize ethoxyethane (diethyl ether) rather than ethene from ethanol using concentrated via intermolecular dehydration, the reaction mixture must be carefully maintained at a specifi

Question

To selectively synthesize ethoxyethane (diethyl ether) rather than ethene from ethanol using concentrated $H_2SO_4$ via intermolecular dehydration, the reaction mixture must be carefully maintained at a specific temperature. What is this exact ideal temperature in degrees Celsius ($^\circ	ext{C}$)?

Prashant Kotian · Accepted Answer

Correct answer: 140. The acid-catalyzed dehydration of ethanol is temperature-dependent. At (), elimination predominates, yielding ethene. At the lower controlled temperature of (), nucleophilic substitution predominates, yielding the ether (ethoxyethane).

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