Author : S. S. D. Brown
Publisher :
Page : pages
File Size : 46,85 MB
Release : 1987
Category :
ISBN :
Author : S.S.D. Brown
Publisher :
Page : 269 pages
File Size : 46,91 MB
Release : 1987
Category :
ISBN :
Author : Steven Andrew Williams
Publisher :
Page : 0 pages
File Size : 40,15 MB
Release : 1998
Category :
ISBN :
Author : P. J. McCarthy
Publisher :
Page : pages
File Size : 11,93 MB
Release : 1988
Category :
ISBN :
Author :
Publisher :
Page : 548 pages
File Size : 23,67 MB
Release : 1989-09
Category : Dissertations, Academic
ISBN :
Author :
Publisher :
Page : 842 pages
File Size : 36,48 MB
Release : 2001
Category : Dissertations, Academic
ISBN :
Theses on any subject submitted by the academic libraries in the UK and Ireland.
Author : F. G. Stone
Publisher :
Page : 24 pages
File Size : 44,41 MB
Release : 1986
Category :
ISBN :
This Report describes the synthesis and structural characterisation of several gold-ruthenium cluster compounds, as well as the discovery of the first trimetallic complexes containing the hexanuclear core structures MM'Ru4 (M = Ag, M' = Cu; M = Au, M' =Cu; M = Au, M' = Ag). Using variable temperature 31P-1H nuclear magnetic resonance spectroscopy we have observed polytopal rearrangements of these clusters in solution. Also described are new heteronuclear cluster compounds containing bonds between iridium and osmium or platinum. In a further study the first mixed-metal clusters involving osmium and platinum with interstitial carbido ligands are reported. Rational synthetic routes have been developed for preparing cluster compounds containing chains and rings of metal atoms in which the metal-metal bonds are bridged by alkylidyne groups. This work has led to the characterisation, via X-ray diffraction and n.m.r. studies, of novel compounds with core structures having eight metal atoms (Pt4W4 or Ni2Pt2W4) in a ring in the shape of a 'star'.
Author : G A Webb
Publisher : Royal Society of Chemistry
Page : 564 pages
File Size : 50,23 MB
Release : 2007-10-31
Category : Science
ISBN : 1847553818
As a spectroscopic method, Nuclear Magnetic Resonance (NMR) has seen spectacular growth over the past two decades, both as a technique and in its applications. Today the applications of NMR span a wide range of scientific disciplines, from physics to biology to medicine. Each volume of Nuclear Magnetic Resonance comprises a combination of annual and biennial reports which together provide comprehensive of the literature on this topic. This Specialist Periodical Report reflects the growing volume of published work involving NMR techniques and applications, in particular NMR of natural macromolecules which is covered in two reports: "NMR of Proteins and Acids" and "NMR of Carbohydrates, Lipids and Membranes". For those wanting to become rapidly acquainted with specific areas of NMR, this title provides unrivalled scope of coverage. Seasoned practitioners of NMR will find this an in valuable source of current methods and applications. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.
Author : F. G. Stone
Publisher :
Page : 22 pages
File Size : 41,65 MB
Release : 1990
Category :
ISBN :
This Final Report describes the synthesis and characterisation of compounds containing metal-metal bonds between dissimilar transition elements. The new compounds reported included species with chains or rings of metal atoms, involving tungsten or molybdenum bonded to the elements nickel, platinum, rhodium, or iridium. The Report also describes numerous mixed-metal compounds in which the metal-metal bonds are bridged by the carbaborane group C2B9H9R2 (R = H or Me). A variety of unprecedented molecular structures have been identified by X-ray crystallographic studies. Keywords: Cluster compounds of platinum, Nickel, Molybdenum, Tungsten, Rhodium, Iridium, Iron, Ruthenium, Gold. (Js).
Author : L.J. Farrugia
Publisher : Springer
Page : 368 pages
File Size : 43,80 MB
Release : 2012-10-21
Category : Science
ISBN : 9789401040600
The analogy between the chemistry of molecular transition metal clusters and the processes of chemisorption and catalysis at metal surfaces (the Cluster Surface analogy) has for a number of years provided an interplay between experimental and theoretical inorganic and physical chemists. This collaborative approach has born fruit in the use of well defined modes of metal-ligand bonding in discrete molecular clusters, models for metal-ligand binding on surfaces. Some of the key topics discussed in The Synergy between Dynamics and Reactivity at Clusters and Surfaces are: (1) Mechanisms of the fluxional behaviour in clusters in the liquid phase and the connections with diffusion processes on extended surfaces. The role of metal-metal bond breaking in diffusion. (2) Analogies in the structure of chemisorbed species and related ligands on metallic clusters. (3) Analogies between benzene surface chemistry on extended metal surfaces and on metal surfaces in molecular cluster compounds with particular reference to structural distortions. (4) The role of mobile precursors for dissociation of chemisorption on extended metals and on clusters. Are there analogies in the ligand attachment during cluster compound synthesis? (5) The role of defect sites on metal surfaces in catalyzing chemical reactions and the connection to the special bonding properties of sites on metal clusters having lowest metal-metal coordination. (6) The size of metal clusters needed to mimic surface phenomena on bulk metal surfaces. Different sites needed for different phenomena.
