Vy. Kotov et Ga. Tsirlina, Close contact distance between hexacyanometallate ions in the course of electron transfer, MENDELEEV C, (5), 1999, pp. 181-182
On the basis of rate constants of redox reactions and stability constants o
f anion pairs, the contact distances between hexacyano-metallate ions in th
e course of electron transfer were estimated as 6.7-7.1 Angstrom, these val
ues are comparable with the contact anion-anion distances in solids and sub
tantially lower than the sum of radii of nonhydrated ions.