1287-13-4Relevant academic research and scientific papers
One-electron oxidation of ruthenocene: Reactions of the ruthenocenium ion in gentle electrolyte media
Swarts, Jannie C.,Nafady, Ayman,Roudebush, John H.,Trupia, Sabrina,Geiger, William E.
, p. 2156 - 2165 (2009)
The electrochemical oxidation of ruthenocene, RuCp2 (Cp = η5-C5H5), 1, has been studied in dichloromethane using a supporting electrolyte containing either the [B(C 6F5)4]-
1H-NMR spectroscopic studies of anion and solvent effects on mixed-valence iodobiruthenocenium(II, IV) salts
Watanabe, Masanobu,Iwamoto, Toschitake,Sano, Hirotoshi,Motoyama, Izumi
, p. 197 - 202 (1993)
Oxidation of 1,1''-biruthenocene with iodoruthenocenium(IV)+Y- salts in CH2Cl2 gives iodo-1,1''-biruthenocenium(II,IV)+Y- salts (Y = PF6, BF4, 2,4,6-(NO2)3C6H2O, CCl3COO * CCl3COOH).The electron exchange reaction between RuII and RuIV with iodide, migration was investigated by temperature-dependent 1H-NMR spectroscopy in CD3COCD3 and the mixed-solvent solutions CDCl3-CD3COCD3, CDCl3-CD3CN and CCl4-CD3COCD3 with a range of mixing ratios.The activation energy of the reaction increases as the concentration of low dielectric constant solvent increases.
A New Synthetic Method for the Preparation of Cyclo-olefin Ruthenium Complexes
Pertici, Paolo,Vitulli, Giovanni,Paci, Maurizio,Porri, Lido
, p. 1961 - 1964 (1980)
Hydrated ruthenium trichloride reacts with cyclohexa-1,3-diene and cyclo-octa-1,5-diene, in the presence of metallic zinc, to give the ruthenium(0) compounds 1-6-η-benzene(1-4-η-cyclohexa-1,3-diene)ruthenium, (1), and (1-2:5-6-η-cyclo-octa-1,5-diene)(1-6-η-cyclo-octa-1,3,5-triene)ruthenium, (2), respectively.The analogous reaction with cyclo-octa-1,3-diene, cyclohepta-1,3-diene, and cyclopentadiene leads to the isolation of the corresponding dienyl complexes bis(1-5-η-cyclo-octadienyl)ruthenium, (3), bis(1-5-η-cycloheptadienyl)-ruthenium, (4), and ruthenocene, (5).Complex (3) is best prepared by heating (2) in hydrocarbon solvents at ca. 100 deg C.
Microwave-Assisted Synthesis and Transformations of Cationic CpRu(II)(naphthalene) and CpRu(II)(naphthoquinone) Complexes
Bocekova-Gajdo?íkova, Eva,Epik, Bugra,Chou, Jingyu,Akiyama, Katsuhiro,Fukui, Nobuaki,Guénée, Laure,Kündig, E. Peter
, (2019)
Details of the direct synthesis of cationic Ru(II)(η5-Cp)(η6-arene) complexes from ruthenocene using microwave heating are reported. Developed for the important catalyst precursor [Ru(II)(η5-Cp)(η6-1-4,4a,8a-naphthalene)][PF6] reaction time could be shortened from three days to 15 min. The method was extended to [Ru(II)(η6-benzene)(η5-Cp)][PF6], [Ru(II)(η5-Cp)(η6-toluene)][PF6], [Ru(II)(η5-Cp)(η6-mesitylene)][PF6], [Ru(II)(η5-Cp)(η6-hexamethylbenzene)][PF6], [Ru(II)(η5Cp)(η6-indane)][PF6], [Ru(II)(η5-Cp)(η6-2,6-dimethylnaphthalene)][PF6], and [Ru(II)(η5-Cp)(η6-pyrene)][PF6]. 1-methylnaphthalene and 2,3-dimethylnaphthalene afforded mixtures of regioisomeric complexes. [Ru(Cp)(CH3CN)3][PF6], derived from the naphthalene precursor provided access to the cationic RuCp complexes of naphthoquinone, tetralindione, 1,4-dihydroxynaphthalene, and 1,4-dimethoxynaphthalene. Reduction of the tetralindione complex afforded selectively the endo,endo diol derivative. X-Ray structures of five complexes are reported.
Moessbauer Spectroscopic Studies of Tin(IV) Halide Adducts with Ruthenocene and with Ferrocenophanes
Watanabe, Masanobu,Motoyama, Izumi,Sano, Hirotoshi
, p. 2109 - 2114 (1986)
Adducts of tin(IV) halide with ferrocenophane were prepared by treating SnX4 (X=Cl or Br) with ferrocenophane in hexane.The adducts were studied by means of 57Fe- and 119Sn-Moessbauer spectroscopy and other physicochemical measurements.Anomalously large quadrupole splittings (3.49 mm s-1 for ferrocenophane-1.5SnCl4 adduct and 3.47 mm s-1 for ferrocenophane-1.5SnBr4 adduct, both at 78 degK) found in the 57Fe-Moessbauer spectroscopy and organotin(IV) species (e.g., isomer shift value, 2.14 mm s-1 for the ferrocenophane-1.5SnCl4 adduct and 2.10mm s-1 for the ferrocenophane-1.5SnBr4 adduct, both at 78 degK) found from the 119Sn-Moessbauer spectroscopy suggest that a direct chemical bonding between Fe and Sn atoms is formed in the ferrocenophane adducts, as the Ru-Sn bonding in the ruthenocene-1.5SnCl4 adduct (isomer shift value, 2.08 mm s-1 at 78 degK).
Site-Specific Deoxyfluorination of Small Peptides with [18F]Fluoride
Rickmeier, Jens,Ritter, Tobias
, p. 14207 - 14211 (2018)
Radiolabeled receptor-binding peptides are an important class of positron emission tomography tracers owing to achievable high binding affinities and their rapid blood clearance. Herein, a method to introduce a 4-[18F]fluoro-phenylalanine residue into peptide sequences is reported, by chemoselective radio-deoxyfluorination of a tyrosine residue using a traceless activating group. The replacement of only one hydrogen atom with [18F]fluoride results in minimal structural perturbation of the peptide, which is desirable in the labeling of tracer candidates.
CYCLOPENTADIENYL-RUTHENIUM AND -OSMIUM COMPLEXES III. CHEMICAL MECHANISM OF DISSOLUTION OF CHLORO(η-CYCLOPENTADIENYL)-BIS(TRIPHENYLPHOSPHINE)RUTHENIUM(II) IN POLAR SOLVENTS
Wilczewski, Tadeusz
, p. 331 - 340 (1985)
The conversion of CpRuCl(PPh3)2 in boiling ethylene glycol within 90 h of reflux has been investigated.New complex cations in the form of their tetraphenylborates, for which the formulae 1RuCl(PPh3)PPh2Cp2Ru(η-C6H5)>+ and + are proposed, were isolated.The former cation is also formed at lower temperatures during the reflux of CpRuCl(PPh3)2 in methanol.The following process takes place: 2CpRuCl(PPh3)2 -> 1RuCl(PPh3)PPh2Cp2Ru(η-C6H5)>+ + Cl- + 2PPh3.In the presence of dicyclopentadiene during the reflux of CpRuCl(PPh3)2 in high boiling polar solvents (ethylene glycol, dimethyl sulphoxide), ruthenocene is formed in a 90 percent yield.One of the cyclopentadienyl groups in ruthenocene originates from dicyclopentadiene.As a result of the reaction of CpRuCl(PPh3)2 and NaBPh4 in a mixture of diglyme and methanol, a colourless, crystalline compound, CpRu(η-C6H5)BPh3, is obtained in a 50-60 percent yield.
A convenient synthetic route to [CpRu(CH3CN3)]PF6
Trost, Barry M.,Older, Christina M.
, p. 2544 - 2546 (2002)
A convenient synthetic route to [CpRu(CH3CN)3]PF6 was presented. A new practical protocol that avoids the stoichiometric use of either thallium or silver salts for the synthesis of the given compound was described. It was shown that the introduction of the cyclopentadienyl ligand via ethanolic reduction of [(arene)RuCl2]2 in the presence of cyclopentadiene is a simple and convenient entry to cyclopentadienylruthenium complexes.
Mixed-Valent Ruthenocene-Vinylruthenium Conjugates: Valence Delocalization Despite Chemically Different Redox Sites
Hassenrück, Christopher,Mang, André,Winter, Rainer F.
, p. 2695 - 2707 (2019)
Ruthenocene-vinylruthenium conjugates Rc/Rc-CHa?CH-Ru(CO)(L)(PiPr3)2 (Rc = (??5-C5H5)Ru(??5-C5H4); Rc? = (??5-C5Me5)Ru(??5-C5H4); L = Cl or ?°O,O′-acetylacetonato) have been prepared and investigated in their neutral, mono-, and dioxidized states by cyclic voltammetry, IR and UV/vis/NIR spectroelectrochemistry, and EPR spectroscopy. Their corresponding radical cations are (almost) completely delocalized mixed-valent systems as indicated by the low half-widths, the absence of solvatochromism, and the low-energy cutoff of their IVCT bands in the near-infrared (NIR) and their IR and EPR spectroscopic signatures. The degree of electronic coupling even exceeds that of their ferrocene analogs despite comparable differences between the intrinsic half-wave potentials of the vinylruthenium and the metallocenyl entities and substantially smaller half-wave potential splittings, ?"E1/2, in the ruthenocene congeners. All experimental results are backed by quantum chemical calculations.
IMPROVED METHOD FOR SYNTHESIS OF ARENECYCLOPENTADIENYLRUTHENIUM CATIONS
Vol'kenau, N. A.,Bolesova, I. N.,Shul'pina, L. S.,Kitaigorodskii, A. N.,Kravtsov, D. N.
, p. 341 - 348 (1985)
An improved method for the synthesis of + salts by means of ligand exchange at ruthenocene is described.A set of new +X- was obtained.The 1H NMR spectra of arenecyclopentadienylruthenium salts were discussed.
