We have previously modeled solvent effects on the metal to ligand charge transfer (MLCT) spectra of Ru2+-(NH3)(5)-pyrazine, Ru2+(NH3)(5)-pyrazine-H+, and Ru2+(NH3)(5)-pyridine and predicted the change Delta mu in dipole moment on excitation of Ru2+(NH3)(5)-pyrazine and Ru2+(NH3)(5)-pyrazine-H+. Prompted by a recent observation of Delta mu for Ru2+(NH3)(5)-pyridine by electroabsorption spectroscopy, we review the results of our previous simulations and evaluate Delta mu. The agreement found between the observed and a priori calculated values is not as close as found for the other complexes but, given the difficulties involved in both the theory and experiment, is very encouraging.