[FeCl4]2 and [FeBr4]2 exhibit ligand-to-metal charge transfer (LMCT) transitions at 45.5103cm1 and 41.0103cm1 respectively. (a) Give the oxidation state of the metal ions in both complex anions. (b) Give the dn configuration of the metal ions in both complex anions. (c) Rationalise the trend in the transition energies. (d) Predict, with reasoning, how the LMCT energy of [FeCl4]would compare to that of [FeCl4]2