[THC]

Q: At what position and on which ring would you expect nitration of 4-brombiphenyl to occur?
4-brombiphenyl: Ar-Ar-Br (Ar and Br in p-position)

A: I expect -NO2 to sit in o-position to the phenyl group on the benzene ring with Br (meta position to Br).

Yes/no/maybe?

[agrobert]

Thats what I think as well.  What about further nitration on the para biphenyl positon?

[THC]

Thats what I think as well.  What about further nitration on the para biphenyl positon?

The -NO2 would sit on the other side, still on the same ring and in the same position (o-position to phenyl). So the name is 2,6-dinitro-4-brombiphenyl or 1-brom-3,5-dinitro-4-phenylbenzene.