NCl3 and PCl3 gives different product on hydrolysis. why?rn
In NCl3, nitrogen and chlorine have similar electronegativities resulting in non-polar bonds. Nitrogen doesn’t have empty d-orbitals so the hydrolysis takes place with the donation of lone pair of electron by nitrogen to the hydrogen atom of water.
NCl3 + H2O → NH3 + 3HOCl
In PCl3, phosphorous is less electronegative than chlorine so, they form a polar bond. So, the positive polar charge on phosphorous attacks the lone pair of electrons on water molecule to give different products.
PCl3 + 3H2O → H3PO3 + 3HCl