posted by Judy .
THe thiocyanate ion acts as a Lewis base, donating a pair of electrons to the Fe ^ 3+ ion. Both sulfur and nitrogen atoms have lone pair electrons that can potentially be donated. Therefore, ther are two different structures (linkage isomers) that can be created when Fe(H2O)6 ^+3 reacts with SCN-.
How does the Lewis structure of the two isomers look like??