September 23, 2019, 05:27:05 AM
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Topic: urgent help, CH3- to CH3Br  (Read 273 times)

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Online sharbeldam

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urgent help, CH3- to CH3Br
« on: September 02, 2019, 05:26:54 AM »
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)

Offline chenbeier

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Re: urgent help, CH3- to CH3Br
« Reply #1 on: September 02, 2019, 06:03:32 AM »
What is CH3-? Methyl is not an compound which exist. You have to use CH4 or something to get it between.

Online sharbeldam

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Re: urgent help, CH3- to CH3Br
« Reply #2 on: September 02, 2019, 06:09:26 AM »
I understand that which was confusing, but its an exam synthesis problem... it was actually CH3CH2- but same concept

Offline rolnor

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Re: urgent help, CH3- to CH3Br
« Reply #3 on: September 02, 2019, 06:37:21 AM »
Do you mean like CH3Li? Or a free radical?

Online sharbeldam

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Re: urgent help, CH3- to CH3Br
« Reply #4 on: September 02, 2019, 07:08:34 AM »
so its not just me, there is something wrong with this question...
Apologies.

Offline kriggy

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Re: urgent help, CH3- to CH3Br
« Reply #5 on: September 02, 2019, 08:34:10 AM »
Can you copy the exact equestion here?

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

Offline Babcock_Hall

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Re: urgent help, CH3- to CH3Br
« Reply #6 on: September 02, 2019, 09:44:11 AM »
@OP,

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

Online sharbeldam

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Re: urgent help, CH3- to CH3Br
« Reply #7 on: September 02, 2019, 11:25:53 AM »
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?

Offline Babcock_Hall

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Re: urgent help, CH3- to CH3Br
« Reply #8 on: September 02, 2019, 01:49:52 PM »
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.

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