C6H5CH2 represents the benzyl group, a functional group in organic chemistry.

Here's a breakdown:

* C6H5: This is the chemical formula for a phenyl group, which is a benzene ring.

* CH2: This is a methylene group, consisting of one carbon atom bonded to two hydrogen atoms.

Therefore, C6H5CH2 is a phenyl group with a methylene group attached.

The benzyl group is commonly found in various organic compounds and is known for its reactivity.