Question

How to convert Propene to 2,3-Dimethylbutane? And also Butan-2-ol to ethanol??

Answer 1

Here is ur answer .
But in 2nd part there should Butan-2-ol from ethanol.
I hope it will help u...

Answer 2

Hey there,

● Propene to 2,3-dimethyl butane -
First propene is treated with HBr to get 2-bromopropane.
CH3-CH=CH2 + HBr ---> CH3-CH(Br)-CH3

2-bromopropane then reacts with sodium (Wurtz reaction) to give 1,2-dimethyl butane.
2CH3-CH(Br)-CH3 + 2Na ---> CH3-CH(CH3)-CH(CH3)-CH3 + 2NaBr

● Butan-2-ol to ethanol -
Butan-2-ol on acid dehydration gives but-2-ene.
CH3-CH2-CH(OH)-CH3 ---> CH3-CH=CH-CH3

But-2-ene on ozonolysis with zinc water gives acetaldehyde.
CH3-CH=CH-CH3 + 2[O] ---> 2CH3-CHO

Acetaldehyde on further reduction produces ethanol.
CH3-CHO + H2 ---> CH3-CH2-OH

Hope this helps you...