Aluminium chloride () exists as a dimer () in the vapor state and in non-polar solvents. What is the hybridization of Aluminium in this dimeric structure?

Question

Aluminium chloride ($AlCl_3$) exists as a dimer ($Al_2Cl_6$) in the vapor state and in non-polar solvents. What is the hybridization of Aluminium in this dimeric structure?

Prashant Kotian · Accepted Answer

Correct answer: B. In the dimer, each Aluminium atom forms three normal covalent bonds with Chlorine and accepts one coordinate bond from a bridging Chlorine atom, resulting in exactly 4 electron domains and hybridization.

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