Electrochemical Influence of Tridentate Polypyrazolylborate Ligands: Syntheses and Electrochemistry of Bis(η3-polypyrazolylborato)ruthenium(II) Complexes

Abstract Concerning electrochemically reversible [Ru(III)]/[Ru(II)] redox couples of the substituted bis(η3-polypyrazolylborato)ruthenium(II) complexes [Ru(L1)(L2)], two polypyrazolylborate ligands, L1 and L2, were independently exerted on the oxidation half-wave potentials (E1/2) of the couples. Relative contributions δE(L) of the respective polypyrazolylborates to the E1/2 values were evaluated.