Question

Propane can b best prepared by the reaction:
A).Ch3Ch2Br + (Ch3)2CuLi (Et2O)
B).Ch3Ch2Ch2COONa +NaOH /CaO
@parthkohli

Answer 1

@kainui

Answer 2

for practical aspects, I find A to be better because B has more byproducts

Answer 3

How can u say that B has more byproducts?

Answer 4

Only water and carbonate ion are the side products that are formed in this reaction as far as i know.

Answer 5

A

Answer 6

Why?

Answer 7

A has no by products

Answer 8

What are RCu and LiX then?

Answer 9

BTW both methods are used

Answer 10

They are essential for reaction... they are reagents

Answer 11

In the first reaction the side products are RCu and LiX
And for second reaction i already mentioned for in reference to parth's post.

Answer 12

Hey wait do u wanna say that RCu and LiX r reagents for the corey house synthesis.?

Answer 13

This is Corey house alkane synthesis...
Yes..
They react with RX to form R2CuLi

Answer 14

Exactly RX is the reagent which is made to react with Li.
And not LiX and RCu .
These are the products formed along with alkane.

Answer 15

Then R2CuLi react with R'-X to form R-R'

Answer 16

Correct!
What about the by -products ?

Answer 17

R-X +2Li = (R+) (Li- )+ LiX in presence of Cux to form gilman's reagent

Answer 18

So It should be A

Answer 19

Will u agree that products formed are alkane,RCu and LiX