Question

Which of the following octahedral complex(es) show geometrical isomerism?
Here a,b,c,d,e,f each are monodentate ligands

Answer 1

Octahedral Complexes Having Monodentate Ligands
$\left[M\right(a{)}_6{]}^{n\pm }$
It does not show geometrical isomerism
$[M{a}_{5}b{]}^{n\pm }$
It does not show geometrical isomerism
$\left[M\right(abcdef){]}^{n\pm }$
It shows geometrical isomerism
Possible number of geometrical isomers for the complex are 15.