Showing papers by "Edward I. Stiefel published in 1998"
TL;DR: Adams and Stiefel as discussed by the authors used x-ray crystallography to provide the first structural glimpse of the iron-only hydrogenase from the hydrogen-producing, anaerobic bacterium Clostridium pasteurianum.
Abstract: Many organisms metabolize hydrogen gas by means of an enzyme called hydrogenase. The nature of the catalytic sites in the hydrogenases has long been a subject of conjecture and debate. In their Perspective, Adams and Stiefel discuss results reported in the same issue by
Peters
et al.
in which x-ray crystallography was used to provide the first structural glimpse of the iron-only hydrogenase from the hydrogen-producing, anaerobic bacterium
Clostridium pasteurianum. With this information, it is hoped that the properties of the hydrogenase enzyme can now be understood and possibly mimicked for chemical processing applications.
256 citations
Patent•
08 Dec 1998
TL;DR: In this article, a trinuclear molybdenum-sulfur compound is made by reacting less than three molar equivalents of a disulfide with one molar equivalent of a compound containing the [Mo3S13]2-ion.
Abstract: Oil-soluble or oil-dispersible trinuclear molybdenum-sulfur compounds are made by reacting less than three, such as 1.5 to 2.5, preferably 2 to 2.1, molar equivalents of a disulfide with one molar equivalent of a compound containing the [Mo3S13]2-ion. The trinuclear compounds include S-containing ligands that are derived from the disulfide reactant via cleavage of the disulfide bond; the ligands are bound to the core via the S atoms.
61 citations
Patent•
17 Nov 1998
TL;DR: The use of trinuclear molybdenum compounds in diesel engine lubricating oil composition to control soot induced viscosity increase of the composition is discussed in this article.
Abstract: The use of (a) one or more trinuclear molybdenum compounds; and/or (b) one or more molybdenum dithiocarbamate and/or dithiophosphate compounds other than those defined in (a), in a diesel engine lubricating oil composition to control soot induced viscosity increase of the composition. The molybdenum compounds are also useful in controlling wear in the diesel engine and extending the drain interval of lubricating oil compositions.
2 citations
Patent•
08 Dec 1998
TL;DR: In this article, a trinucleaires comprennent des ligands contenant S lesquels sont derives du reactif disulfure par clivage de la liaison disulfures; les ligands sont lies au noyau par les atomes S.
Abstract: On a produit des composes trinucleaires de molybdene-soufre solubles dans l'huile ou dispersables dans l'huile en faisant reagir moins de 3, tel que 1,5 a 2,5, de preference 2 a 2,1 equivalents molaires d'un disulfure avec un equivalent molaire d'un compose contenant l'ion [Mo3S13]2-. Les composes trinucleaires comprennent des ligands contenant S lesquels sont derives du reactif disulfure par clivage de la liaison disulfure; les ligands sont lies au noyau par les atomes S.