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Showing 1 to 20 of 82 for “"Metal Ligand"”.
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Metal-ligand multiple bonds in organometallic complexes containing triamidoamine ligand systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Metal-ligand redox interaction in the multielectron chemistry of porphyrinogen coordination compounds
Metal complexes of the macrocycle porphyrinogen (calix[4]pyrrole) are studied with an emphasis on the redox activity ("non-innocence") of the ligand (Chapter I). Porphyrinogen complexes of spherical, redox-inert metal dications exist in three oxidation states, dianionic, neutral, and dicationic, …
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Chemical methods for the study of metal-ligand interactions in aquatic environments.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1977
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Metal-ligand cooperativity in first row transition metals: hydrosilylation catalysis and mechanistic insights
The utility of transition metal catalysts has greatly expanded the scope of organic reactions. Historically, homogenous catalysis is dominated by platinum group metals (PGMs) due to their relative high activity and stability to air when compared to the 1st row counterparts of PGMs. However, 1st row …
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Developing Structure-Activity-Relationships for Metal-Ligand-Cooperative (MLC) Complexes using PR2NR′2 Ligands
… of an intramolecular acid/base site on the ligand manifold of an organometallic complex has allowed for new mechanistic pathways and enhanced reactivity. This thesis delves into understanding organometallic complexes in catalysis by systematic tuning the ligand properties. Synthesis of …
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I. The Synthesis of Hydroxo-Bridge Metal Complexes. Ii. The Measurement of Metal-Ligand Bond Vibrations in Complexes
Made available in DSpace on 2014-12-05T19:37:13Z (GMT). No. of bitstreams: 1 6000171.pdf: 5159505 bytes, checksum: 083f52d3b943bac66567279834da57a0 (MD5) Previous issue date: 1959
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The gas chromatographic separation properties of azulene and the synthesis and characterization of bulky bis-pyrazolylpyridine metal-ligand complexes.
… and characterization of bulky tridentate ligand-metal complexes. Azulene is an aromatic molecule with interesting properties, most notably a permanent dipole moment of 1.08 D. This degree of polarity in the absence of heteroatoms is quite rare and offers potential for use in unique gas …
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Study of the ligand effects on the metal-ligand bond in some new organometallic complexes using FT-Raman and -IR spectroscopy, isotopic substitution and density functional theory techniques
… the FT-Raman and –IR spectroscopy on new organometallic complexes, synthesized in the work-groups B-2 (Prof. W. Malisch), B-3 (Prof. W. A. Schenk), D-1 (Prof. H. Werner) and D-4 (Prof. D. Stalke). The FT-Raman spectra recorded at 1064 nm led to very useful and interesting information. …
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The effects of metal ion and ligand substitution on the spectroscopic properties of metal complexes.
Metal-nitrogen stretching vibrations in Co(II), Ni(II), Cu(II) and Zn(II) chloride 4-methylaniline complexes are assigned by ¹⁵N-labelling in conjunction with a consideration of the relative crystal field stabilizition energies of the metal ions. Bands in the ultraviolet electronic spectra of …
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An Investigation of Electrostatic Interactions Between Organically Functionalized Silica Particles, Surfaces, and Metal Ions
… silica particles and either coated surfaces or metal ions. This work has two objectives: to begin a preliminary investigation into particle-surface systems that may be ideal for further investigation as a sensor and to investigate metal-ligand interactions for the potential use of metal ions to …
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Probing the Roles of Metal Binding Ligands in Cupredoxins: Incorporating Nonproteinogenic Amino Acids Into Azurin and Copper a Azurin
… investigate the specific function of individual metal ligand residues in azurin and CuA azurin by using EPL to incorporate nonproteinogenic amino acid analogues has been demonstrated. This work has resulted in new insights into the role of the metal ligands and has shaped future metalloprotein …
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Non-Covalent Interactions in the Design and Performance of Macromolecules for Biological Technologies
… Hydrogen bonding, ionic interactions, and metal-ligand interactions highlight the supramolecular interactions examined in this work. Their broad utility in the fields of nanoparticle formulations, polymer chemistry, and additive manufacturing facilitated the generation of numerous …
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On Metal synthesis of Some Substituted Rhenium and Manganese Complexes
<p>Heterocyclic organic and organometallic compounds (i.e. polypyrrole), and their derivatives, have been of great interest for conductive polymers due to their novel properties and environmental stability as compared to their non-aromatic analogs (i.e. polyacetylene). Our current interest focus …
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Chirality directed self-assembly: in situ construction of recyclable and reusable Janus dendrimers
… Herein, we successfully demonstrate a novel metal-ligand self-assembly approach with a high level of chiral discrimination to construct Janus dendrimers in situ. As far as we are aware, this is the first such example utilizing metal-ligand interaction for the construction of Janus dendrimers. …
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Effects of metal ion–ligand interactions on the synthesis of metal nanostructures with controlled morphology
… controlling parameters for the synthesis. For metal nanoparticles, the interactions between metal ions and commonly used ligands in solution-phase synthesis are still not clear, nor are the effects of these interactions on the formation of metal nanocrystals. It is crucial to improve our …
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The crystal and molecular structures of some bioinorganic compounds
… the results of X-ray structural studies of seven metal-containing crystalline compounds. In some cases, the ligands associated with the metals are themselves biologically active; in other cases, the compound as an entity, rather than any constituent, is of direct or indirect biological …
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Progressive design and self-assembly of supramolecular architectures : based on metallamacrocyclic nickel(II) complexes with bipodal tetra-alkylaroylbis (thioureas)
… are used as pre-programmed cheiating ligands to form metallamacrocyclic square planar nickel(ll) complexes via self-assembly. Metal : ligand stoichiometries of either 2:2 or 3:3 can be achieved by using meta- or para- substituted ligands. The metallamacrocyclic complexes are …
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Synthesis, Characterization And Reactivity Studies Of Nickel Complexes Supported By A Phosphinimine-Based Pincer Ligand
Tridentate pincer-type ligands offer both electronic and steric flexibility and have been used to stabilize highly reactive species, including late transition metal complexes with metal–ligand multiple bonds. Herein, we report a series of novel nickel complexes supported by a pincer-type …
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