Coordination numbers metallic radii affected

Besides its position in the periodic table, other factors that affect the atomic radius of a transition metal in a coordination complex are (i) the oxidation state, (ii) the spin state, and (iii) the coordination number. An increase in the oxidation state of the metal atom is expected to result in shorter metal-ligand bond distances. However, this fact can only be observed when comparing complexes with the same ligands, since statistically the differences in atomic radii for a metal with different oxidation states, within a large set of complexes, are not significant. Much clearer is the sizable difference in atomic size that a certain metal in a given oxidation state presents for two alternative spin... 

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