\([IrF_3 (H_2O)_2(NH_3)] \); Hyb. \(:\) \(d^2sp^3;\) exhibits geometrical isomerism but does not exhibit optical isomerism.
\([NiCl_2(en)_2]\) ; Hyb. \(:\) \(sp^3d^2;\) exhibits both geometrical isomerism and optical isomerism.
\([Co(CN)_2(ox)_2]^{3-}\) ; Hyb. \(: d^2sp^3 ;\) exhibits both geometrical isomerism and optical isomerism.