Question

Why 2 al atoms are close in al2me6 as compared to al2cl6?

Answer 1

Answer:

The vacant pure unhybridised “p” orbital is perpendicular to the plane of the molecule. Below 400°C AlCl3 exists as a dimer Al2Cl6 with each aluminium atom utilizing four sp 3 hybrid orbitals. Dimer Al2Cl6 is sp3 hybridised and tetrahedral at aluminium. Al2Cl6 is non-planar and non-polar molecule

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