【】How to Convert propene to propyne and propyne to propene conversion

How to Convert Propyne to Propene

propyne to propene conversion


Propyne reacts with hydrogen (H₂) in presence of  Pd and BaSO₄ at 25ºc temperature and produce propene(CH₃-CH=CH₂).
Propyne reacts with hydrogen (H₂) in presence of Pd and BaSO₄ at 25ºc temperature and produce propene(CH₃-CH=CH₂).



Here BaSO4 acts as catalyst poison towards Pd catalyst reducing it's catalytic action and controls the upto first stage.


How to Convert Propene to Propyne 


How to convert propene to propyne conversion


        Step-1:

Propene(CH₃-CH=CH₂) reacts with Br₂ in presence of CCl₄ and produce 1,2-dibromo propane( CH₃-CH(Br)CH₂Br).
Propene(CH₃-CH=CH₂) reacts with Br₂ in presence of CCl₄ and produce 1,2-dibromo propane( CH₃-CH(Br)CH₂Br).




            Step-2:

1,2-dibromo propane( CH₃-CH(Br)CH₂Br) reacts with (alc)KOH and produce 1-bromo propene-1(CH₃-CH=CH-Br).
1,2-dibromo propane( CH₃-CH(Br)CH₂Br) reacts with (alc)KOH and produce 1-bromo propene-1(CH₃-CH=CH-Br).




         
             Step-3:

1-bromo propene-1(CH₃-CH=CH-Br) reacts with sodamide and produce propyne.

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