Chemical Forums

Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: mglbs on February 19, 2021, 11:54:49 AM

Title: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: mglbs on February 19, 2021, 11:54:49 AM
Can anyone help me with the following reaction?
I have no idea how to solve it.
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: chenbeier on February 19, 2021, 12:35:58 PM
The magnesium likes  the bromine. So what will be left if magnesiumbromide is gone?
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: mglbs on February 19, 2021, 12:41:22 PM
The magnesium likes  the bromine. So what will be left if magnesiumbromide is gone?

Only cyclo hexane or?
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: chenbeier on February 19, 2021, 12:49:01 PM
No, do you know the Wurtz reaction. Where did you left the benzyl group.
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: mglbs on February 19, 2021, 12:59:43 PM
No, do you know the Wurtz reaction. Where did you left the benzyl group.

I'm not sure. Is it (Cyclohexylmethyl)benzene?
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: chenbeier on February 19, 2021, 01:06:27 PM
Correct or Benzyl-cyclohexane
Title: Re: Reaction of cyclohexylmagnesium bromide and benzyl bromide
Post by: BjornS on February 20, 2021, 04:20:36 AM
Are you familiar with the term "grignard reagent"? The molecule on the left side of the arrow is one (simplified with: RMgX (R=carbonchain, X=halogene)).

The Br molecule which is attached to toluene (simplified as RX) reacts as a leaving group when RMgX attacks it.

I think chenbeier made it all clear to you yesterday. But  maybe this makes it more clear.

Also a tip: If you get a question where bromocyclohexane reacts with Mg (as the reagent) it will also form the molecule on the left side of the arrow.