Question

What spectroscopic technique is best suited for studying the electronic transitions in transition metal coordination compounds containing a ligand with significant pi-donation properties, such as an ethylenediamine or a bipyridine ligand?

Answer 1

The best spectroscopic technique for studying the electronic transitions in transition metal coordination compounds containing a ligand with significant pi-donation properties, such as ethylenediamine or bipyridine ligand, is UV-Visible  UV-Vis  spectroscopy. This technique is particularly useful for studying the d-d transitions, charge-transfer transitions, and ligand-to-metal charge-transfer  LMCT  transitions in these types of complexes.