Showing papers by "Edward I. Stiefel published in 1989"
TL;DR: Preparation d'une serie de complexes du ruthenium(II) is described in this article, where it is shown how to construct a spectrometrie UV visible, RPE et voltammetrie cyclique
Abstract: Preparation d'une serie de complexes du ruthenium(II). Etude radiocristallographique, spectrometrie UV visible, RPE et voltammetrie cyclique
84 citations
Patent•
14 Dec 1989TL;DR: In this article, the authors provided a lubricating composition comprising a major amount of an oil of lubricating viscosity and a minor amount of additive having the formula Mo 2 L 4 wherein L is a ligand selected from xanthates and mixtures thereof.
Abstract: In accordance with this invention, there is provided a lubricating composition comprising a major amount of an oil of lubricating viscosity and a minor amount of an additive having the formula Mo 2 L 4 wherein L is a ligand selected from xanthates and mixtures thereof and, in particular, xanthates having a sufficient number of carbon atoms to render the additive soluble in the oil. In general, the xanthate ligand, L, will have form about 2 to 30 carbon atoms.
48 citations
TL;DR: Inorganic syntheses starting with the tetrathiometallates of molybdenum, tungsten, vanadium and rhenium produce new homonuclear transition metal sulphide (TMS) complexes and clusters by utilizing internal redox processes as mentioned in this paper.
25 citations
Patent•
20 Mar 1989TL;DR: In this article, a transition metal containing an organo-metallic complex is used to contact the feedstock in the presence of hydrogen with a predecessor catalyst comprising molybdenum or tungsten sulfide.
Abstract: Hydrocarbon feedstocks are selectively hydrodesulfurized by contacting the feedstock in the presence of hydrogen with a predecessor catalyst comprising molybdenum or tungsten sulfide which has been promoted by reaction with a transition metal containing organo-metallic complex wherein the valence of the metal is 0 or +1 at the time of reaction and the contacting is done at a temperature and pressure sufficient to substantially hydrodesulfurize the hydrocarbon.
18 citations
8 citations
TL;DR: The e.p.r. spectroscopy of the nitrogenase molybdenum-iron protein from Clostridium pasteurianum was re-investigated and the sharpness of the delta Ms = +/- 3 g'z peak from the +/- 3/2 Kramer's doublet enables the observation and quantification of incompletely resolved hyperfine splittings from the stable magnetic nuclei 95Mo and 57Fe in samples enriched in these isotopes.
Abstract: The e.p.r. spectroscopy of the nitrogenase molybdenum-iron protein from Clostridium pasteurianum was re-investigated. The sharpness of the delta Ms = +/- 3 g′z peak from the +/- 3/2 Kramer9s doublet enables the observation and quantification of incompletely resolved hyperfine splittings from the stable magnetic nuclei 95Mo and 57Fe in samples enriched in these isotopes. No couplings to 1H or 17O could be discerned by examination of spectra from samples exchanged into 2H2O and H2(17)O respectively. Simulation of the spectrum from 95Mo-enriched samples yields a hyperfine coupling of 2.9 MHz, and indicates that the earlier electron-nuclear-double-resonance-derived estimate of 8.1 +/- 0.2 MHz is substantially in error.
5 citations
TL;DR: Preparation d'une serie de complexes du ruthenium(II) is described in this article, where it is shown how to construct a spectrometrie UV visible, RPE et voltammetrie cyclique
Abstract: Preparation d'une serie de complexes du ruthenium(II). Etude radiocristallographique, spectrometrie UV visible, RPE et voltammetrie cyclique
1 citations
TL;DR: Caracterisation au moyen de la spectrometrie IR des complexes de cobalt (II), etude radiocristallographique avec determination de la structure moleculaire.
Abstract: Caracterisation au moyen de la spectrometrie IR des complexes de cobalt (II). Etude radiocristallographique avec determination de la structure moleculaire