Why are lewis bases good ligands?

1 Answer
Dec 2, 2015

By definition a Lewis base is an electron pair donor.


Given that Lewis bases are electron pair donors, they can certainly bind to Lewis acidic centres (such as #H^+# and metal ions), which ACCEPT electron density. Metal-ligand ligation formally involves donation of an electron pair from the ligand to the metal. For a complex such as #[Fe(OH_2)_6]^(3+)#, what was the Lewis acid, and what was the Lewis base before the complex was formed?