The complex [Pt(NH) (SCN)] forms two
stereoisomers, whereas the complex [Pt(en)(SCN))
forms only one.
✓ What, if anything, does this prove about the geometry of these
complexes? Explain.
✓ As part of your answer, sketch and name these three isomers

There are two geometrical isomers of the octahedral complexes of type MA₃X₃ (Figure a), where M is metal, and A and  X are monodentate ligands. Of the complexes shown here, which are identical to (1) and which are the geometric isomers of (1)? Complex(2), Complex(3), Complex(4), Complex(5)?

                                                                      Figure a.