Last edited by Zuran
Saturday, July 25, 2020 | History

2 edition of Some reactions on the disulphides of molybdenum and tungsten. found in the catalog.

Some reactions on the disulphides of molybdenum and tungsten.

Ronald Liam Wilson

Some reactions on the disulphides of molybdenum and tungsten.

by Ronald Liam Wilson

  • 58 Want to read
  • 18 Currently reading

Published .
Written in English


Edition Notes

Thesis (Ph. D.)--The Queen"s University of Belfast, 1962.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL20335759M

the reaction of nitrogen with the disulfides and diselenides of molybdenum, tungsten, and niobium, no nitrides or ternary compounds form at temperatures up to °CFrom literature data [2 Alkyl cyanides (RCN, R = Me, Et, and n-Pr) react with molybdenum(v) chloride, tungsten(vi) and tungsten(v) chloride, and tungsten(v) bromide, with reduction of the metal to the quadrivalent state

  Reaction between gaseous nitrogen dioxide and gaseous uranium hexafluoride results in the formation of the nitrylium salt NO/sub 2/UF/sub 6/. Under similar conditions no reaction occurs between nitrogen dioxide and molybdenum and tungsten ://   Halogen Chemistry, Volume 3 focuses on advancement in the study of halogens. molybdenum, and tungsten. The book closes with discussions on halogen chemistry of actinides and halogeno metal carbonyls and related compounds. and hexavalent actinides, and structures and reactions of halogeno metal carbonyls. The compilation is a valuable

Without an inducing element, such as Ni, Co, and Fe, the reduction of tungsten ions to W metal does not occur. This behavior has been referred to as induced codeposition by Brenner (Brenner, Recovery of tungsten and molybdenum in organic phase using a second stage extraction scheme was >99%, and the recovery of tungsten was % using the first stage of solvent :// /_Recycling_of_Secondary_Tungsten_Resources.


Share this book
You might also like
Plastics Industry and Its Prospects

Plastics Industry and Its Prospects

Basic microeconomics

Basic microeconomics

Nonferrous metals forecast and analysis, first quarter, January 1978

Nonferrous metals forecast and analysis, first quarter, January 1978

idea of progress

idea of progress

The godson

The godson

200 years of insurance in Guernsey.

200 years of insurance in Guernsey.

Flight and integration

Flight and integration

Nuclear power, option for the world

Nuclear power, option for the world

Real-time contour surface display generation

Real-time contour surface display generation

Chemical & Engineering News Index, Annual 1995 (Chemical and Engineering News Annual Index)

Chemical & Engineering News Index, Annual 1995 (Chemical and Engineering News Annual Index)

Evolution of ore-bearing Precambrian structures

Evolution of ore-bearing Precambrian structures

Presidential quiz

Presidential quiz

Four impressions.

Four impressions.

Some reactions on the disulphides of molybdenum and tungsten by Ronald Liam Wilson Download PDF EPUB FB2

JOURNAL OF CATALYSIS 4, () Catalytic Reactions of Ethyl Mercaptan on Disulfides of Molybdenum and Tungsten P. KIERAN AND C. KEMBALL From the Department of Chemistry, The Queen's University of Belfast, Northern Ireland Received Octo The exchange reaction between ethyl mereaptan and deuterium has been followed over molybdenum disulfide and over tungsten JOURNAL OF CATALYSIS 4, () Some Catalytic Reactions of Thiophene on Disulfides of Tungsten and Molybdenum P.

KIERAN AND C. KEMBALL From the Department of Chemistry, The Queen's University of Belfast, Northern Ireland Received October 6, The exchange reaction between thiophene and deuterium has been followed over tung- sten disulfide and over molybdenum Catalytic exchange of hydrogen sulphide and of hydrogen with deuterium on disulphides of molybdenum and tungsten R.

Wilson, C. Kemball and A. Galwey, Trans. Faraday Soc.,58, Tungsten() chloride is oxidised by trichloroacetonitrile to give a tungsten() complex containing a tungsten-nitrogen triple bond. CClCClNWCl,CClCN; tungsten() chloride gives the same complex with trichloroacetonitrile and analogous complexes with monochloroacetonitrile and 1-cyano-1,1,2-trichloroethane.

The i.r. s   The following chapters in Molybdenum and Tungsten Enzymes: Inorganic Chemistry review advances in the field of molybdenum- and tungsten-dependent oxidoreductases and nitrogenase by bioinorganic model chemistry, or more precisely the synthetic and catalytic evaluation of model systems.

All this falls into the core expertise of two of the three   we hardly ever consider molybdenum. the biological role of molybdenum Table a bundances of molybdenum, tungsten and some other elements with biological relevance in different environments Location abundance (ppb by atoms) Mo W Fe h C n o universe 20 × × × 90 × 10 × 10 Crustal rocks /files/ Molybdenum and Molybdenum-Containing Enzymes is a collection of papers that deals with the various concerns with molybdenum-containing enzymes.

The text first covers the organometallic chemistry of molybdenum, and then proceeds to tackling molybdenum-containing enzymes, such as xanthine oxidase, aldehyde oxidase, and sulphite :// In contrast to the multinuclear iron- and molybdenum-containing center in bacterial nitrogenases (responsible for fixing atmospheric nitrogen into the biosphere), the active sites of all other well-characterized molybdenum- and tungsten-containing enzymes are mononuclear, with a single equivalent of the addition to the metal, an unusual pterin cofactor is an integral part of the Molybdenum is essential to most organisms, being found in the active site of enzymes that catalyze redox reactions involving carbon, nitrogen and sulfur atoms of key metabolites.

Some of the molybdenum-dependent reactions constitute key steps in the global biogeochemical cycles of carbon, nitrogen and sulfur, with particular emphasis on the "The page hardcover book summarizes recent progress in the field, pointing to how new catalysts may ultimately supplant precious metals in some types of reactions.

Also, the book goes on to highlight the remaining chemical challenges and areas in need of The exchange reaction between hydrogen sulfide and deuterium was followed in the temperature range l50 to deg C on a molybdenum disulfide catalyst and in the range 40 to deg C on a sample of tungsten disulfide, the latter having a substantially greater surface area than the :// Several new peroxo complexes of molybdenum and tungsten containing different organic ligands have been prepared.

The complexes have the compositions [ Pol phedron Vol. 22, pp. Printed in Great Britain /92 $ + Pergamon Press Ltd THE SYNTHESIS AND REACTIVITY OF SOME PEROXO COMPLEXES OF MOLYBDENUM(VI) AND TUNGSTEN(VI) M.

SAIDUL ISLAM* and M. MASIR UDDIN Department of Chemistry, Rajshahi University, Rajshahi, Bangladesh (Received 30 June ; accepted 13 July Figure 1 illustrates synthetic route to the tungstenocene intermediate and some of its reactions with aromatic C--H bonds and other reactions.

£t** reactions. The tungstenocene is formed in situ. (i) R = EtOCO, in toluene at 5 0 °. Molybdenum is a chemical element with the symbol Mo and atomic number The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores.

Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of A study was made of the character of reactions of HfN, the most refractory nitride, with molybdenum, tungsten, and tantalum, with measurements of initial melting points.

Nitrogen was chosen as the sintering atmosphere for HfN-Mo(W) specimens. Specimen temperatures were measured with   Novel tungsten− and molybdenum−dinitrogen complexes bearing 1,1′-bis(diethylphosphino)ferrocenes as auxiliary ligands have been prepared and characterized crystallographically.

Reactions of these complexes with an excess amount of sulfuric acid in methanol at room temperature yield ammonia in good yields. This result is in sharp contrast to the previous result Molybdenum, vanadium, and tungsten compounds are very interesting and efficient catalysts that are used for a wide range of chemical reactions.

The accomplishment of a quite high catalytic activity with relatively low metal loading is a great advantage, generating low-cost and   Molybdenum and Molybdenum-Containing Enzymes is a collection of papers that deals with the various concerns with molybdenum-containing enzymes.

The text first covers the organometallic chemistry of molybdenum, and then proceeds to tackling molybdenum-containing enzymes, such as xanthine oxidase, aldehyde oxidase, and sulphite :// The desorption of chemisorbed hydrogen by N 2 (g) and CO(g) has been investigated with tungsten, tantalum and molybdenum monoxide is particularly effective, about 40 % of the hydrogen chemisorbed on tungsten and molybdenum at 10 –3 mm and 0°C being desorbed at the same temperature and a CO pressure of ∼10 –5 mm; the replacement reaction conforms to a stoichiometric.

Synthesis, reactivity, and electrochemistry of some new nitrides of molybdenum and tungsten: crystal structure of trinuclear [{µ-MoN(N 3) protonation and methylation reactions of either the mono- or tri-nuclear nitrides allow the preparation of mononuclear imide derivatives.

books or book chapters) do not need to formally request   The synthesis and characterization of some tungsten nitrides and reduced molybdenum oxides Clark Dale Carlson Iowa State University Follow this and additional works at: Part of the Inorganic Chemistry ?article=&context=rtd.Catalysis without Precious Metals 1st Edition * Molybdenum and Tungsten Catalysts for Hydrogenation, Hydrosilylation and Hydrolysis pointing to how new catalysts may ultimately supplant precious metals in some types of reactions.

Also, the book goes on to highlight the remaining chemical challenges and areas in need of further study  › Books › Science & Math › Chemistry.