Question

Can ${\mathrm{Cl}}^{-}$ act as a Lewis base?

Answer 1

Lewis base:

1. Lewis base is a chemical specie which has a pair of non-bonding electrons.
2. So lewis bases are electron donors.
3. Here, ${\mathrm{Cl}}^{-}$ has non-bonding electrons which can be donated to form a bond.
4. For example: In complex ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{2+}$, $\mathrm{Cl}$ donates non-bonding electron pair to $\mathrm{Co}$ for forming a bond and act as lewis base.