cis-Bis(bipyridine)(dimethylglyoxime)ruthenium(II): an electrochemical and spectroscopic investigation of proton-coupled electron transfer

Hetero‐ and homo‐leptic Ru(II) catalyzed synthesis of cyclic carbonates from CO2; Synthesis, spectroscopic characterization and electrochemical properties

“…The 1 H‐NMR spectra provide information on the cis ‐coordination of the bpy phen, dafo and dcbpy ligands. As reported previously, each of the 2,2′‐bipyridine (bpy) 1,10‐phenanthroline (phen), 4,5‐diazafluoren‐9‐one (dafo) or 3,3′‐dicarboxy‐2,2′‐bipyridine (dcbpy) rings of a bpy, phen, dafo or dcbpy ligands are magnetically nonequivalent due to the cis ‐geometry of the complexes 50–52…”

A Recoverable Ruthenium Aqua Complex Supported on Silica Particles: An Efficient Epoxidation Catalyst

“…The complexes exhibit ligand-based p-p*b ands below 350 nm and relatively intense bands above 350 nm, mainly due to dp(Ru)p*(L) metal-to-ligand charge-transfer (MLCT) transitions. [12][13][14] The redoxproperties of complexes 2 and 3 were determined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) experiments (see Figures S5 and S6 in the Supporting Information). [12][13][14] The redoxproperties of complexes 2 and 3 were determined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) experiments (see Figures S5 and S6 in the Supporting Information).…”

“…[11] The MLCT bands of the Ru chlorido complex are shifted to longer wavelengths relative to the corresponding Ru aqua complex because of the destabilization of the dp(Ru) levels provoked by the anionic chlorido ligand. [12][13][14] The redoxproperties of complexes 2 and 3 were determined by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) experiments (see Figures S5 and S6 in the Supporting Information). Chlorido complex 2 ( Figure S5a in the Supporting Information) exhibits aq uasireversible one-electronR u III/II redox wave at E 1/2 % 0.93 Vv ersus SCE;t he analogousc omplex [RuCl(trpy)(pypz-Me)] + [8] reaches the Ru III oxidation state at lower potential( 0.80 V), which evidencest he greatere lectronwithdrawing capacity of the trpy-P-Et ligand with regard to trpy,w hich destabilizes the Ru III oxidation state in complex 2.…”

Synthesis, spectral characterization, electrochemical studies and catalytic properties in Suzuki–Miyaura coupling reactions of the mononuclear PdII, trinuclear PdII(BPh2)2 and RuIIPdIIRuII type complexes containing 4‐amino‐1‐benzyl piperidine and phenyl groups

“…As reported previously, each of the pyridine or phenantroline rings of a bpy or phen ligand are magnetically nonequivalent due to the cis-geometry of the complexes. [17,23] Therefore, multiplets are observed around at 8.20-6.12 ppm in 4 and 5 complexes and have been assigned to the aromatic protons of 4 and 5 metal complexes.…”