Electron transfer in groups of iron, cobalt, and copper triazene 1-oxides: Hammett correlation, ligand redistribution, and crystal field effects

Ruthenium(II) mediated C–H activation of substituted acetophenone thiosemicarbazones: Synthesis, structural characterization, luminescence and electrochemical properties

“…The slope of the line which is known as the reaction constant q [59] is a measure of the sensitivity of E 1/2 with the substituent (R) for the Ru II /Ru I couple. This shows that the nature of the para substituent R on the acetophenone thiosemicarbazide ligands can still influence the metal-centered potentials in a predictable manner.…”

Ruthenium(III) mediated C–H activation of azonaphthol: Synthesis, structural characterization and transfer hydrogenation of ketones

“…Ru IV /Ru III Ru III /Ru II Ru II /Ru I constant q [50] and is a measure of the sensitivity of E 1/2 with R is 0.36 for the Ru IV /Ru III couple, 0.17 for the Ru III /Ru II couple and 0.12 for the Ru II /Ru I couple. This shows that the nature of the para substituent R on the 1-(arylazo)naphtholate ligand, which is four bonds away from the electroactive metal center, can still influence the metal-centered potentials in a predictable manner.…”

Rhodium assisted CH activation of N-(2′-hydroxyphenyl)benzaldimines. Synthesis, structure and electrochemical properties of a group of organorhodium complexes

“…The potential increases with increasing electron-withdrawing character of the substituent R. The plot of oxidation potential vs r [r = Hammett constant of R [11], OCH 3 = À0.27, CH 3 = À0.17, H = 0.00, Cl = 0.23 and NO 2 = 0.78] is linear (Fig. S2) with slopes (q) of 0.28 V (q = reaction constant of this couple [12]), which shows that the substituent (R) on the coordinated benzaldimine ligand, which is four-bonds away from the metal center, can still influence the metal-centered oxidation potential in a predictable manner. The second oxidative response is tentatively assigned to oxidation of the coordinated benzaldimine ligand.…”