Chemistry - CHEMICAL BONDING Question with Solution | TestHub

Gallous tetrachloro aluminate (${\mathrm{GaAlCl}}_4$) exists as ${\mathrm{Ga}}^{+}{\mathrm{AlCl}}_4^{-}$.

Due to the presence of d-orbital in the case of $\mathrm{Ga}$, the shielding effect of the d-orbital electrons is very poor so the size of the $\mathrm{Ga}$ atom is smaller than expected and so it can attract the shared pairs of electrons more effectively. Hence, the electronegativity of $\mathrm{Ga}$ is more than $\mathrm{Al}.$