Explain why the following compounds behave as Lewis acids?
– It is an electron-deficient compound due to the presence of 6 electrons in its outermost orbital along with a vacant p orbital. Therefore, it behaves as Lewis acid and accepts a lone pair of electrons.
– It forms a covalent bond with chlorine through formation of three single bonds of chlorine. There are three electrons in the valence shell of Aluminium and thus it acts as an electron-deficient compound, therefore behaving as a Lewis acid.