[Hijaz Aslam]

1.



Can I know the mechanism of the above reaction?

2.



Why does the Bromine gets attached to Carbon 1 in the diagram? Why not Carbon 2?

[kriggy]

When you see UV light in reaction conditions its always (or almost always?¨) radical mechanism.
What do you know about stability of radicals?

[OrgXemProf]

In the light (no pun intended!) of kriggy's suggestion, consider the first reaction (cyclohexene + Br2 + heat/UV light):

What product(s) would be expected to be formed if 1-deuteriocyclohexene had been used as starting material instead of (unlabeled) cyclohexene?

Then, consider the second reaction (para-nitroethylbenzene + Br2 + heat/UV light):

Would you expect alpha-bromination to occur faster, slower or at about the same rate if para-methoxyethylbenzene had been used as starting material instead of para-nitroethylbenzene?