[sharbeldam]

How can i get ch3br from ch3-?
what i had in my mind is this, please tell me if it works. either i react the ch3- with Br2 but not sure that would work.
or i react it with an acid, it takes a hydrogen from the acid to become CH4 and then i react ch4 with Br2 (with heat or UV)

[chenbeier]

What is CH₃-? Methyl is not an compound which exist. You have to use CH₄ or something to get it between.

[sharbeldam]

I understand that which was confusing, but its an exam synthesis problem... it was actually CH3CH2- but same concept

[rolnor]

Do you mean like CH3Li? Or a free radical?

[sharbeldam]

so its not just me, there is something wrong with this question...
Apologies.

[kriggy]

Can you copy the exact equestion here?

I think it might be how to convert CH3-R to BrCH2-R ?

[Babcock_Hall]

@OP,

Free radical bromination is occasionally synthetically useful, but often it is not.  Can you explain to us why it often is not useful?

[sharbeldam]

Well I cant wait for next year to start working in a lab to find out all these stuff because until now i only solve on paper only.
but i can only think of two options... maybe that it requires a lot of energy or too expensive?

[Babcock_Hall]

One disadvantage is that mixtures are produced, and much of what controls the proportion of the mixture is how stable the carbon-centered radical intermediate is.  This may or may not apply to your problem.