Consider the catalytic dehydrogenation of alcohols over heated Copper at 573 K. If you pass separate equimolar vapours of Ethanol, 2-Propanol, and 2-Methyl-2-propanol over the catalyst, how many of th

Question

Consider the catalytic dehydrogenation of alcohols over heated Copper at 573 K. If you pass separate equimolar vapours of Ethanol, 2-Propanol, and 2-Methyl-2-propanol over the catalyst, how many of these three substrates will chemically release Hydrogen gas ($H_2$) as a byproduct?

Prashant Kotian · Accepted Answer

Correct answer: 2. Ethanol (primary) dehydrogenates to acetaldehyde + . 2-Propanol (secondary) dehydrogenates to acetone + . 2-Methyl-2-propanol (tertiary) undergoes dehydration, not dehydrogenation, releasing (water) and forming isobutylene. Therefore, only 2 substrates release gas.

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