Question

prepare 1-propyne from 1-propene​

Answer 1

check the attachment

Answer 2

Hey dear,

● 1-Propene to 1-propyne -
1-Propene can be converted to 1-propyne in following steps -

# Step 1 -
1-propene on treatment with bromine in dark gives 1,2-dibromopropane.
CH3-CH=CH2 + Br2 (dark) → CH3-CH(Br)-CH2-Br


1,1-dibromopropane undergoes elimination reaction with alc.KOH to form 1-propyne.
CH3-CH(Br)-CH2-Br + 2KOH (alc.) → CH3-C≡CH + 2KBr + 2H2O

Hope this helped you...