C3H7Cl can represent 1-chloropropane, which is a compound with the chemical formula C3H7Cl.

When reacting with a Lewis acid catalyst, such as AlCl3, 1-chloropropane can undergo an electrophilic aromatic substitution reaction to form W(C), which could potentially be a chlorinated aromatic compound.

Without further information or context, it is difficult to determine the specific compound formed by the reaction. Additional details or a more specific question would be helpful in providing a more accurate answer.