Disproportionation reaction of Ru2Cl(μ-O2CCH3)4 with bbtp [bbtp = tert-butylbis(2-thienyl)phosphine]. X-ray crystal structures of Ru2(μ-O)(μ-O2CCH3)2 (O2CCH3)2(bbtp)2 and cis-Ru(O2CCH3)2(bbtp)2·CH2Cl2

Paramagnetic Precursors for Supramolecular Assemblies: Selective Syntheses, Crystal Structures, and Electrochemical and Magnetic Properties of Ru2(O2CMe)4-n(formamidinate)nCl Complexes, n = 1−4

“…In refluxing MeOH, two different compounds were isolated: the oxidized Ru 3+ Ru 3+ edge-sharing bioctahedral complex [ trans -Ru 2 (μ-OMe) 2 (μ-O 2 CMe) 2 (HDAniF) 4 ]Cl 2 ( 6 ) with a Ru−Ru single bond and the reduced Ru 2 4+ complex Ru 2 (DAniF) 4 ( 7 ). Few examples are known of disproportionation of a Ru 2 5+ core and even fewer examples in which the oxidized product has been isolated . At present, it is not clear why methanol promotes this disproportionation process, which can be described with the general equation Compound 6 is the first edge-sharing bioctahedral diruthenium complex with bridging acetate and MeO groups in transoid positions to each other defining a symmetrical N 4 O 2 coordination environment around the singly bonded Ru 3+ Ru 3+ unit.…”

Synthesis and reactivity of ruthenium(II) complexes containing hemilabile phosphine–thiophene ligands

“…12- 24 A number of complexes containing phosphine-thiophene ligands, such as PPh 3 Ϫ x Th x (Th = 2-thienyl, x = 1-3), in which only the phosphine coordinates, have also been reported. [25][26][27][28][29][30][31][32][33] We elected to examine bidentate hemilabile ligands incorporating a phosphine and thiophene. This motif was recently employed by Weinberger et al to make polymerizable ruthenium complexes; 12 however, we chose to place the phosphine directly on the oligothiophene backbone to provide the most intimate contact between the metal and the ligand in both mono-and bi-dentate coordination modes.…”

An in Situ X-ray Absorption Fine Structure Study of Different Oxidation States of Oxo- and Hydroxo-Bridged Ruthenium Dimers in Acetonitrile Solution

“…7 Oxo-and hydroxo-bridged dinuclear ruthenium complexes offer an alternative approach to the structural study of oxobridged dimetal complexes at various oxidation states formed during the redox cycle in solution, because the di-, tri-, and tetravalent ruthenium ions are all substitution inert and stable enough for a relevant study of the structure. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] of a strong acid, p-toluenesulfonic acid (TsOH), to the solutions, two reduction waves remarkably shift to more positive potentials with improved reversibility, which has been accounted for by protonation at the oxide bridge of the Ru II Ru III and Ru II Ru II states (see Scheme 1). 27 The crystal structures for the (µ-oxo)-or (µ-hydroxo)bis(µcarboxylato)diruthenium complexes have been determined at high oxidation states.…”

“…Oxo- and hydroxo-bridged dinuclear ruthenium complexes offer an alternative approach to the structural study of oxo-bridged dimetal complexes at various oxidation states formed during the redox cycle in solution, because the di-, tri-, and tetravalent ruthenium ions are all substitution inert and stable enough for a relevant study of the structure. − Among various dimeric ruthenium complexes redox behaviors of the complexes [Ru 2 (μ-O)(μ-CH 3 COO) 2 (bpy) 2 L 2 ] 2+ (bpy = 2,2‘-bipyridine; L = pyridine (py) ( 1 ), 1-methylimidazole (meim) ( 2 ); Figure ) are particularly interesting since they show proton-coupled redox reactions both in acetonitrile and in aqueous media. In acetonitrile the complexes show a reversible oxidation wave for the Ru III Ru IV /Ru III Ru III couple, one quasi-reversible wave for the Ru III Ru III /Ru II Ru III couple, and an irreversible wave for the Ru II Ru III /Ru II Ru II couple.…”