• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 76
  • 52
  • 2
  • 1
  • 1
  • Tagged with
  • 704
  • 74
  • 58
  • 36
  • 32
  • 23
  • 19
  • 19
  • 17
  • 17
  • 15
  • 14
  • 14
  • 13
  • 12
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
191

Polymer-supported pincers for selective molecular and ionic binding

Golden, Christopher Alex January 2005 (has links)
This thesis reports an investigation into the preparation and use of immobilised pyridine-2,6-dicarboxamide pincers for applications including heterogeneous catalysis, metal-ion sequestering and chiral separation. Prior to the exploration of solid-phase techniques, a number of novel pincer-like model compounds based on bis-(4-substituted) pyridine-2,6-dicarboxamides were synthesised and their molecular and metal-ion binding properties investigated. Crystallography was used to probe their behaviour in the solid state and UV-visible titrations were performed in order to investigate the formation of metal-ion complexes in solution. The model compounds also formed the basis of the solid-phase aspect of this work. Several different routes towards the immobilisation of the pyridine-cored pincers on polystyrene resin supports were in:y'estigated. Two strategies were found to be particularly useful: (i) using an ether-based linkage for linking 4-hydroxy-substituted pincers to Merrifield resin; and (ii) using a secondary amine linkage for linking 4chloro- substituted pincers with aminomethyl resin. The search for an all-carbon linkage from resin support to pincer unfortunately proved to be unsuccessful. The use of pincer-like ligands in catalysis is well documented in the literature and attempts were made to match some of the metal-ion pincer-complexes prepared in this study with catalytic reactions. A number of novel esters were prepared during the course of this work and an investigation into their solid-state properties was undertaken.
192

Cross-coupling, catalysts and chirality : a computational and structural study

McMullin, Claire Louise January 2012 (has links)
No description available.
193

Diphosphines with PXP backbones for chromium-catalysed ethene oligomerisation

Jaltai, Judit January 2010 (has links)
No description available.
194

Transition Metal Catalysed Dehydrocoupling of Amine- Borane Adducts : Mechanistic Insight and Applications

Sloan, Matthew Edward January 2009 (has links)
No description available.
195

Towards organocatalysis of hydorgen peroxide ooxidations

Liu, Mumu January 2008 (has links)
No description available.
196

Synthesis and resolution of a pentadeuterated monodentate P*-chiral phosphine and conversion to an isotopically desymmetrised Trost modular ligand

Filali, Emane January 2009 (has links)
No description available.
197

Iron-Catalysed Cross-Coupling : Exploiting Zinc- and Boron-Based Nucleophiles

Huwe, Michael January 2010 (has links)
No description available.
198

Novel catalysts and additives for ruthenium-based metathesis systems

Robinson, Alan January 2009 (has links)
No description available.
199

Rhodium-phosphinite catalysts for the ortho-arylation of phenols

Long, Philip January 2010 (has links)
No description available.
200

Ignition, burning, and explosion of gunpowder

Blackwood, J. D. January 1952 (has links)
No description available.

Page generated in 0.0205 seconds