What type of halide, the compound C_6H_5CH_2Br , is?

The given compound is $\text{C}_6\text{H}_5\text{CH}_2\text{Br}$.

In this compound, the halogen atom ($\text{Br}$) is bonded to an $sp^3$ hybridized carbon atom ($\text{CH}_2$) which is directly attached to an aromatic ring ($\text{C}_6\text{H}_5$).

Halides in which the halogen atom is bonded to an $sp^3$ hybridized carbon atom next to an aromatic ring are classified as benzylic halides.

Answer: benzyllic