Mutual effects in the chemical properties of the ruthenium metal center and ancillary ligands upon coordination

The mutual changes induced in both metal center and selected ligands kinetics and thermodynamic properties, as a consequence of the coordination, are discussed in terms of σ- and π-bonding. Ruthenium penta and tetraammines are used as models, focusing the attention on phosphines, phosphites, nitrosyl, sulfite and sulfate as ancillary ligands.