26 A complex of the type ${\left[M{\left(AA\right)}_{2}{X}_{2}\right]}^{n+}$is known to be optically active.

What does this indicate about the structure of the complex? Give one

example of such complex.

An optically active complex of the type ${\left[M{\left(AA\right)}_{2}{X}_{2}\right]}^{n+}$ indicates cis-octahedral structure,

eg. cis  because its minor image isomers are

non-superimposable.

Non-superimposable isomers of ${\left[Pt{\left(en\right)}_{2}C{l}_{2}\right]}^{2+}$