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Showing 1 to 14 of 14 for “"anionic ligands"”.
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High oxidation state organometallic and coordination chemistry: The synthesis and reactivity of nitridoosmium(VI) thiolates and alkoxides
… BF\sb4\rbrack$ with a variety of anionic ligands is reported in Chapter 3. Reactions of this solvate complex with monodentate, anionic ligands yield binuclear or trinuclear complexes, whereas reactions with multidentate and facially-coordinant, anionic ligands, such as indenyl and …
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Novel N-Ligand Stabilized Transition Metal Complexes of the Group IV Triad as Efficient Catalysts for Polymerization and Oligomerization
… and the complete characterization of the ligands and complexes, mechanistic aspects concerning the individual poly-/oligomerizations and the detailed analysis of the resulting poly-/oligomeric products were covered. The new complexes were tailored for specific polymerization methods by …
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Diazine-bridged coordination polymers of copper and nickel : synthesis and thermal, spectral, structural, and magnetic properties
… susceptibility measurements. The neutral ligands used in the study were pyrazine (1,4-diazine), pyridazine (1,2-diazine), methylpyrazine, 2,5-dimethylpyrazine, pyridine and 4,4'-bipyridine. Anionic ligands of a range of coordinating abilities were employed. These include cyanate, nitrate, …
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Synthesis of Early Transition Metal Complexes Supported by Pyrrolyl and Indolyl Based Ligands
… such as alkenes, alkynes, and epoxides. Anionic ligands enable the metal center to retain Lewis acidity for catalytic applications and chelating ligands increase stability due to the chelate effect. Frequently, Constrained Geometry Catalysts (CGC) are comprised of early transition metals …
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Chemistry of low-valent osmium
… of d⁶ and d⁸ osmium. The reactivity of certain ligands coordinated to low-valent osmium has also been investigated. Various hydride complexes of osmium(II) were prepared as potential precursors of osmium(O). OsH₄(PPh₃)₃ reacts with p-tolylisocyanide (TIC) and …
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The Design and Application of Ion-paired Ligands to Address Selectivity Challenges in Transition Metal Catalysed Oxygen and Nitrogen Transfer Reactions
… in this field involve the use of chiral ligands on the metal to induce asymmetry and whilst a well-proven approach to enantiocontrol, it is not universally applicable. Our group has developed an alternative approach in which achiral anionic ligands are ion-paired to chiral cations based …
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ANION EFFECTS IN HOMOGENOUS PALLADIUM CATALYSIS AND LUMINESCENT PROPERTIES OF COPPER(I) COMPLEXES BEARING A WEAKLY-COORDINATING ANIONIC N-HETEROCYCLIC CARBENE LIGAND
… dissertation concerns how the locality of an anionic moiety, be it a weakly coordinating anion or an anionic ligand, affect the spectroscopic and structural properties of organotransition metal complexes. Probing the columbic interactions between traditional and novel weakly coordinating …
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Design of Lewis Acidic Pnictenium Ions Using Carbone and Capping Arene Ligands for Bond Functionalization
… a key role in the isolation of such species. Anionic ligands with large steric profiles, as well as carbenes, have been widely implemented to stabilize subvalent heavy group 15 element compounds. However, synthetic strategies to prepare Lewis acidic antimony and bismuth complexes remain …
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Routes to complexes of open chain polyethers
… of inserting phosphonate residues into polyether ligands to develop a new class of ligands. Although the presence of phosphorus containing crown ether systems is known, it was found that the direct insertion of the phosphonate residues on to polyether ligands is not possible. As an another route …
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Design and synthesis of new metallo-organic complexes and their evaluation as anti-cancer agents. Synthesis, characterisation and biological evaluation of novel, late first row transition metal schiff base complexes, as anti-cancer metallopharmaceuticals
… and understand the role of metal, chelating ligands and anionic ligands when carrying out their cytotoxic effect. This study has lead to a better understanding of the action of these classes of complex and will be used to direct the design of new anti-cancer metallopharmaceuticals going …
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Characterization of semiconductor nanocrystals using advanced solid-state NMR spectroscopy
… of semiconductor nanomaterials over surface ligands, composition, size, and morphology, as well as integrated them into devices. However, to rational design semiconductor nanomaterials, which advances the science and applications of nanomaterials, analytical techniques capable of probing …
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A Radical Approach to Photochemical Transformations Using Earth-Abundant Metals
… In general, this reaction scheme can convert anionic ligands to the corresponding radical forms which can function in various radical transformations including functionalization of unsaturated hydrocarbons and intermolecular C-H functionalization. Most importantly, a great synthetic advantage …
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Molybdenum and tungsen alkylidene species for catalytic Enantio-, Z-, and E-selective olefin metathesis reactions
… 2Pyr), in which the imido and aryloxide ligands occupy axial positions. NMR studies of Mo(NAr)(C 3H6)(OBitet)(2,5-Me 2Pyr) showed that the metallacyclobutane - species is in equilibrium with ethylene/methylidene intermediates before losing ethylene to yield the respective methylidene …
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Investigations into cyclopropanation and ethylene polymerization via salicylaldiminato copper (II) complexes
… little relates the two chapters apart from the ligands. The first chapter addresses diastereoselective homogeneous copper catalyzed cyclopropanation reactions. Cyclopropanation of styrene and ethyl diazoacetate (EDA) is a standard test reaction for homogeneous catalysts. Sterically bulky …