Question

What is the difference in reactivity for a `C_"aryl"-X` versus a `C_"alkyl"-X` bond?

Answer 1

Between `C_6H_5X` and `C_6H_5CH_2X`?

Explanation:

Well, clearly, there is a difference. Benzyl halides are reasonably labile, and will undergo substitution reactions. On the other hand, the `C_"aryl"-X` is stronger and will not undergo easy substitution, and certainly not undergo elimination.