Question

What is the product formed when cyclohexene is reacted with H₂ in the presence of Pt?

Answer 1

Cyclohexene reacts with hydrogen in the presence of a Pt catalyst to form cyclohexane. This is a hydrogenation reaction where the double bond in cyclohexene is reduced. Pt serves as a sustainable catalyst because it is not consumed during the reaction.

Step-by-step explanation:

Hydrogenation of Cyclohexene

When cyclohexene is reacted with hydrogen (H₂) in the presence of a platinum catalyst (Pt), the product formed is cyclohexane. This reaction is an example of a hydrogenation reaction, where the double bond of the alkene (cyclohexene) is reduced to a single bond, thereby converting it into an alkane (cyclohexane). The reaction typically takes place under mild conditions, although sometimes high pressure of H₂ gas may be needed. However, the feature of the reaction with Pt as the catalyst is that it is not consumed during the reaction process, allowing it to be a sustainable catalyst choice.

Here is a step-by-step explanation of the hydrogenation reaction:

1. 
   
2. Cyclohexene is exposed to a stream of hydrogen gas in the presence of Pt catalyst.
3. 
   
4. H₂ gas molecule splits into two hydrogen atoms under the influence of the Pt catalyst.
5. 
   
6. These hydrogen atoms add to the carbons of the double bond in cyclohexene, resulting in the formation of cyclohexane.