Interactions of Some Cationic Cobalt(III) Complexes with Anions Studied by the 59Co NMR Chemical Shifts

The NMR peak of 59Co(III) cationic complexes shifts upfield upon interacting with anions when the interaction is mainly electrostatic; it shifts downfield when the hydrophobic interaction acts additively with the electrostatic interaction. These trends are enhanced in micellar solution systems.