Write the mechanism of hydration of ethene to yield ethanol.

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Solution

The mechanism of hydration of ethene to form ethanol involves three steps.

Step 1:

Protonation of ethene to form carbocation by electrophilic attack of H₃O⁺:

Step 2:

Nucleophilic attack of water on carbocation:

Step 3:

Deprotonation to form ethanol:

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Ethanol can be converted into ethene which can be changed into ethane. Choose the correct word or phrase from the brackets to complete the following sentences.

(a) The conversion of ethanol into ethene is an example of (dehydration, dehydrogenation).
(b) Converting ethanol into ethene requires the use of (conc. HCl, conc. $H N O_{3}, c o n c . H_{2} S O_{4})$ .
(c) The conversion of ethene into ethane is an example of (hydration, hydrogenation).
(d) The catalyst used in the conversion of ethene into ethane is commonly (iron, nickel, cobalt).

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Write the mechanism of hydration of ethene to yield ethanol.

The mechanism of hydration of ethene to form ethanol involves three steps. Step 1: Protonation of ethene to form carbocation by electrophilic attack of H3O+: Step 2: Nucleophilic attack of water on carbocation: Step 3: Deprotonation to form ethanol:

The mechanism of hydration of ethene to form ethanol involves three steps.

Step 1:

Protonation of ethene to form carbocation by electrophilic attack of H₃O⁺:

Step 2:

Nucleophilic attack of water on carbocation:

Step 3:

Deprotonation to form ethanol: