GKFix MCQ Question

Why does aluminum chloride (AlCl₃) exist as a dimer (Al₂Cl₆) in the vapor phase?

• A. Aluminum is too small.
• B. Chlorine atoms are highly electronegative.
• C. Aluminum has an incomplete octet and accepts electron pairs from chlorine atoms of another AlCl₃ molecule.
• D. Aluminum readily loses electrons.