26455-80-1Relevant academic research and scientific papers
REACTIONS OF TETRA-μ-CARBOXYLATO-DIRUTHENIUM(II,II) COMPOUNDS. X-RAY CRYSTAL STRUCTURES OF Ru2(Μ-O2CCF3)4(thf)2, Ru2(Μ-O2CR)4(NO)2 (R=Et OR CF3), AND (Na3(Ru2(Μ-O2CO)4)*6H2O)N
Lindsay, Alan J.,Wilkinson, Geoffrey,Motevalli, Majid,Hursthouse, Michael B.
, p. 2723 - 2736 (1987)
Improved procedures for the synthesis of the diruthenium(II)carboxylates, Ru2(μ-O2CR)4L2, and substitutions of either the bridged carboxylate or axial ligands (L) are described.Among new bridged compounds are the trifluoroacetate, Ru2(μ-O2CCF3)4, the carbonate, (Na3(Ru2(μ-O2CO)4)*6H2O)n, and the triazenide, Ru2(μ-N3Ph2)4; adducts of the triazenide include the nitrosyl, Ru2(μ-N3Ph2)4(NO)2, the isocyanide, Ru2(μ-N3Ph2)4(ButNC), and the carbonyl Ru2(μ-N3Ph2)4(CO)2.Reactions of the carboxylates with donors such as isocyanides, pyridine (py), phosphines, or CO leads in some cases to bridge cleavage and products such as trans- Ru(O2CR2)(py)4 or Ru(O2CR)2(PPh3)2 (R=Me or CF3), while the reactions with NO yield the diamagnetic adducts Ru2(μ-O2CR)4(NO)2.Infrared, n.m.r., e.s.r., and electronic spectra are recorded together with cyclic voltametric studies.The X-ray crystals structures of the dimers Ru2(μ-O2CCF3)4(thf)2 (thf=tetrahydrofuran) and Ru2(μ-O2CR4)(NO)2 (R=Et or CF3), and the polymer (Na3(Ru2(μ-O2CO)4)*6H2O)n are reported.
Ruthenium acetate complexes as versatile probes of metal-ligand interactions: Insight into the ligand effects of vinylidene, carbene, carbonyl, nitrosyl and isocyanide
Welby, Christine E.,Eschemann, Thomas O.,Unsworth, Christopher A.,Smith, Elizabeth J.,Thatcher, Robert J.,Whitwood, Adrian C.,Lynam, Jason M.
, p. 1493 - 1506 (2012/06/16)
Reaction of cis-Ru(2-OAc)2(PPh3) 2 with two-electron donor ligands L results in the formation of complexes trans-[Ru(1-OAc)(2-OAc)L(PPh3) 2] (L = CO, NO+, CNtBu). Vinylidene complexes (L = C=CHR) may be prepared from the corresponding reaction with terminal alkynes HC=CR, and species containing hydroxyvinylidene ligands (L = C=CHCR1R 2{OH}) may be prepared from related reactions with propargyl alcohols HC=CCR1R2{OH}. Treatment of cis-Ru(κ2- OAc)2(PPh3)2 with ω-alkynols HC=C(CH 2)nOH (n = 2-4) results in the formation of oxacyclocarbene complexes [L = CCH2(CH2)nO]. An analysis of the spectroscopic data and the structural metrics (as determined by X-ray crystallography) of this series of complexes allows for the relative donor/acceptor properties of the ligand L to be evaluated. This comparison indicates that the vinylidene ligand behaves in a similar fashion to the isocyanide ligand. The complex cis-[Ru(2-OAc)2(PPh 3)2] acts as a precursor for the formation of the complexes trans-[Ru(1-OAc)(2-OAc)L(PPh3) 2] where L is a two-electron donor, σ-donor/π-acceptor ligand. The structural and spectroscopic data of these species provide insight into the relative electron demand of the ligands L.
Synthesis, X-Ray Crystal Structure, and Fluxional Behaviour of fac-*2CH3CO2H
Lindner, Ekkehard,Fawzi, Riad,Hiller, Wolfgang,Carvill, Andrew,McCann, Malachy
, p. 2691 - 2696 (2007/10/02)
reacts with excess triphenylphosphane in acetic acid to give fac-*2CH3COOH (1), which crystallizes in the triclinic space group with Z = 2.The three phosphane ligands are in the sterically congested facial configuration, and the distorted octahedral geometry around the metal is completed by a unidentate and chelating acetate.A variable temperature 31P(1H)-NMR study of the complex in CH2Cl2 showed the three phosphanes to be inequivalent at low temperature.On raising the temperature two separate coalescence processes are observed, ultimately making all of the phosphanes equivalent at room temperature.Complex 1 shows slight catalytic activity for the ring-opening polymerization of bicyclohept-2-ene (norbornene).Key Words: fac-*2CH3COOH / Tris(triphenylphosphane)ruthenium(II) / Polymerization / Bicyclohept-2-ene / Ruthenium complexes
