Question

Choose the most appropriate reagent(s) for conversion of 2-phenylethanol to (2-bromoethyl)-benzene. HBr, H2O NaBr, acetone Br2 PBr3 Br2, ROOR

Answer 1

`PBr_(3)` is the most appropriate reagent

Step-by-step explanation:

`PBr_(3)` is the most appropriate reagent for the given conversion.

Because in presence of
`PBr_(3)`, -OH group is replaced by Br without any arrangement of the alcohol substrate.

Here -OH groups first attacks
`PBr_(3)` and replaces a
`Br^(-)` from it. This
`Br^(-)` gives a nucleophilic substitution reaction in the second step to break C-O bond and to form C-Br bond.

Full mechanism has been shown below.