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Proton Environments and NMR?

I need to draw the low resolution proton NMR spectra for bromobenzene and 1,4-dinitrobenzene, but I don't understand how to work out the number of proton environments for aromatic compounds...

Can someone explain this to me?
Thanks
Original post by Wild@Heart
I need to draw the low resolution proton NMR spectra for bromobenzene and 1,4-dinitrobenzene, but I don't understand how to work out the number of proton environments for aromatic compounds...

Can someone explain this to me?
Thanks


Environments can be worked out by looking at the neighbouring groups and atoms.

For example, in bromobenzene there are two protons that are ortho (neighbouring) the carbon holding the bromine. These are in the same environment.

Then there are two protons on the next carbon meta (two carbons away from) the carbon holding the bromine.

Finally there is one proton para to the carbon holding the bromine.

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