Question

Draw the structure of the major monohalo product for each of the following reactions:

Hint:

In the presence of heat, bromination occurs at the benzylic position, replacing a hydrogen atom with a bromine atom.

Answer 1

Under thermal conditions, the reaction undergoes bromination, yielding a benzylic bromination product. Specifically, the hydrogen atom on the benzylic carbon (adjacent to the benzene ring) is substituted by a bromine atom, resulting in 1-bromo-2-phenylethane as the principal product.
The structure of the product is: