Is it true you can only add H to an alkene?

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    Alkene
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Hydrogenation of alkenes is not limited to adding hydrogen; it can also be reversed through dehydrogenation. This process involves converting alkanes back into alkenes using heat and a platinum catalyst. Textbooks often illustrate ethene undergoing addition reactions with halogens, but they may not explicitly discuss the reversibility of hydrogenation. The discussion clarifies that dehydrogenation is indeed possible, demonstrating the versatility of alkene reactions. Understanding these reactions enhances comprehension of organic chemistry principles.
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My textbook introduces the reaction of catalyzed Hydrogenation and later on in the chapter states that all reactions have the ability to proceed forward or backward, yet in the elimination reactions chapter they do not mention this reaction.

So, is it true?
 
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No that's not true.
In many textbooks there are examples of ethene undergoing an addition reaction with a halogen.
 
No I meant to say is it possible to reverse Hydrogenation.
 
Oh sorry.
Dehydrogenation you mean?
Yes it is possible by this reaction:

CH3-CH2-CH3 + heat ----> CH2=CH-CH3 + H2

using a platinum catalyst.

:smile:
 
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