Question

Why melting point of AlF3 is more than AlCl3

Answer 1

The boiling and melting points are a function of the INTERMOLECULAR bonds more so that the internal bonds. The bonds inAlF3 are much more ionic than the bonds in AlCl3, which are polar covalent. ... In fact, when AlCl3sublimes it stays together as molecules of AlCl3 (actually Al2Cl6) in the gas phase