Question

Give an example of chelate effect.

Answer 1

\[\ce{Ni^{2+}_{ (aq)} + 6NH_{3 (aq)} <-> \underset{log \beta = 7.99}{[Ni(NH3)6]}^{2+}_{ (aq)}}\]

\[\ce{Ni^{2+}_{ (aq)} + 3en_{(aq)} <-> \underset{(more stable)}{\underset{log \beta = 18.1}{[Ni(en)_3]}}^{2+}_{ (aq)}}\]

Answer 2

or, \[\ce{[PtCl2(en)]}\]