Coordination Compounds

$\left[\mathrm{CrCl}_2(\mathrm{ox})_2\right]^{3-}$ - Exhibits cis- trans isomerism and cis isomer is optically active

$\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right]$ - Exhibits both cis- trans and optical isomerism

$\left[\mathrm{Fe}(\mathrm{CN})_4\left(\mathrm{NH}_3\right)_2\right]^{-}$- Exhibits cis- trans isomerism and both exhibit optical isomerism

$\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-} \quad$ - Exhibits cis- trans isomerism but is optically inactive