Question

Which one is more stable in diethyl ether anhydrous AlCl₃ or hydrous AlCl₃ Explain in terms of bonding.

Answer 1

In diethyl ether 

oxygen atom has two free pair (lone pair) of electrons and in anhydrous AlCl₃, aluminium has vacant 3p-orbital of valence shell. So lone pair of electron denote aluminium of AlCl₃ is more soluble in diethyl ether by means of solvolysis in comparison to hydrous AlC₃ (ie,AlCl₃. 6H₂O). Hydrous AlCl₃ is a polar compound, while ether is non-polar, so on basis of Thumb's rule like dissolve in like solvents.

Hence, due to this reason hydrous AlCl₃ is least soluble in ether.