“…While the main changes in volume of conjugate ions in a redox couple are associated with the difference of electrostriction between the pair of ions, significant effects which must be considered can also arise from the change of ionic radius or ligand-to-metal bond length (24,25). Thus, in an isoelectronic series, e.g., Na +, No, and F-, changes of charge produce appreciable changes, ~r, of radii, from 0.95, through 1.1-1.36A, respectively, for these three elements.…”