conversion;but-1-ene to but-2-ene
I am giving 2 methods involving catalytic isomerization of 1-Butene. In first method Ni catalyst used to give 2-Butene and in the second method alumina is used as catalyst to give a mixture of cis- and trans-2-butenes.
(i) 1-butene is converted to 2-butene by catalytic isomerization. 1-Butene undergoes isomerization to 2-Butene on a nickel catalyst in the presence of hydrogen at around 65 degree C. In this reaction, double-bond migration undergoes simultaneously with the hydrogenation reaction.
Ni catalyst/65o C
CH3CH2CH=CH2 --------------------> CH3CH=CHCH3
1-Butene Hydrogenation 2-Butene
(ii) The reaction is the isomerization of the olefin 1-butene to a mixture of cis- and trans-2-butenes in the presence of freshly dried, activated alumina which is used as the catalyst.