Question

alkali metals are poor complexing agent.explain

Answer 1

Because alkali is weak oxidizing agent.Complexing agent is related with reduction.Is they don't have D orbital electrons like transition metals. They don't tend to share their S orbital electrons,because they are relatively easy to strip so they form positive ions.They bond to other atoms then by an ionic bond.Transition metals have the D orbital electrons as well as empty orbits.So they can make coordination bonds where the electrons get shared.It's not strong like a direct covalent bond or an ionic bond.But it does allow them to make coordination bonds to multiple adjacent atoms,so they form complexes.