The octahedral complex [Sc(H2O)3(CN)3] reacts with HF and produces a complex [Sc(H2O)4F2]+. The two F ligands are trans to one another.
a) Sketch the two possible stereoisomers of the starting material [Sc(H2O)3(CN)3].
b) Identify which of the two starting isomers could produce the observed product, assuming that the CN groups remain in place.