Coordination Compounds

A tetrahedral complex of the type \([\mathrm{Ma}_2 \mathrm{b}_2]\) does not show geometrical isomerism

Coordination entities of the type \([\mathrm{Ma}_3 \mathrm{b}_3]\) do not exhibit geometrical isomerism

Square planar complex  of the type [Mabcd] has 3 possible geometrical isomers

In a coordination entity of the type \([\mathrm{Ma} 2(\mathrm{bb})_2]^{2+}\) only the cis-isomer is optically active