Solution:
In tetrahedral all the position are adjacent to one another hence only one isomer is possible
A coordination complex of type MX2Y2 (M-metal ion; X,Y-monodentate ligands), can have either a tetrahedral or a square planar geometry. The maximum number of possible isomers in these two cases are respectively:
In tetrahedral all the position are adjacent to one another hence only one isomer is possible