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Showing 1 to 13 of 13 for “"Two-coordinate"”.
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Low-temperature protonation studies of transition metal alkyl complexes and the synthesis and characterization of early transition metal PCP pincer complexes and two-coordinate alkylamido complexes
… of the ethane complex indicate that the ethane coordinates to [Cp*Os(DFMPM)]+ through a single hydrogen atom in either an η2- or κ1-fashion, depending on whether or not the carbon atom is significantly involved in the bonding interaction. The IPR studies afford chemical shifts of δT = 1.99 ± …
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Syntheses, properties, and reactions of transition metal complexes of di(tert-butyl)amide and 2,2,6,6-tetramethylpiperidide
… FeBr2(dme), CoBr2(dme), and NiBr2(dme) with two equivalents of LiN(t-Bu)2 in pentane, followed by sublimation in static vacuum, affords the two-coordinate compounds M[N(t-Bu)2]2 (M = Mn, Fe, Co, Ni) previously reported by our group. Previous work established that the Mn and Fe compounds have …
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Modeling the chemical and photophysical properties of gold complexes.
… nature of the ligands: σ-donors gave a two-coordinate, linear shape; however, σ-acceptors yielded a three-coordinate, trigonal planar geometry. Doublet AuIIL3 complexes distort to T-shape, and are thus ground state models of the corresponding triplet AuIL3. The disproportionation of …
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Intermediates and Mechanisms of Gold(I)-Catalyzed Nucleophilic Addition Reactions
… interest in the synthesis and study of cationic, two-coordinate gold pi-hydrocarbon complexes. However, few experimental studies have been focused on gold pi-heteroatom complexes. Moreover, gold(I)-catalyzed reactions may involve protic acids (H+), so it is significant to establish more detailed …
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Synthetic and catalytic studies of Group 11 N-heterocyclic carbene complexes
… the synthesis, structure and reactivity of two-coordinate Group 11 metal complexes, supported by N-heterocyclic carbene (NHC) ligands. The NHC ligand was found to stabilize monomeric, terminal fluoride complexes of copper, silver and gold, the last representing the first isolable gold(I) …
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Exploring the Chemistry of Bis(azido)phosphine Chalcogenides and the Pursuit of Isolable Phosphinidene Chalcogenides
The study of low-coordinate species and the pursuit of interesting bonding motifs has revealed new reactivity modes for main-group compounds, akin to transition metals, in the past two decades. An underexplored class of two-coordinate phosphorus compound is a phosphinidene sulfide, which has yet to …
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Novel Schiff-base and Benzamide N,O-Donor Ligands for Development as Fluorionophores and Selective Metal Ion Binders
… to give the appropriate metal-amine complex. In two cases these by-products were characterised by X-ray crystallography. One showed the entrapment of a two-coordinate copper(II)chloride molecule within the lattice, along with the inclusion of a monochloro-bridged dinuclear copper species. A novel …
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Synthesis and Structure of Polyoxoanion Supported Organorhodium (I) and Organoiridium (I) Complexes
… $\sb3$ (2) reported previously. In 1, two Nb$\sb2$W$\sb4$O$\sb \sp{4-}$ anions act as pentadentate bridging ligands in which both terminal and bridging oxygens are utilized to bind five (C$\sb8$H$\sb $)Ir$\sp+$ units. Reaction of compound 1 with 3 eq of (Nb$\sb2$W$\sb4$O$\sb …
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Octant Analysis of the Reynolds Stresses in the Three Dimensional Turbulent Boundary Layer of a Prolate Spheroid
… data under free-stream and wall-collateral coordinates. (The wall-collateral coordinate system is aligned with the mean tangential velocity in the buffer-layer.) The octant analysis led to the development of a structural model that extends the sweep/ejection process to three dimensions. …
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Simulation of creep in nickel based single crystal superalloys
… compared to the other materials. This is due to two factors: solid solution and precipitation strengthening of the gamma ([gamma]) and gamma prime ([gamma]') phases, and the elimination of grain boundaries. Creep of Nickel based single crystal Superalloys are caused by two primary mechanisms, …
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Synthesis, characterization and chemical vapor deposition of transition metal di(tert-butyl)amido compounds
… FeI₂, CoBr₂(DME), or NiBr₂(DME) with two equivalents of LiN(t-Bu)2 in benzene affords the two-coordinate complex M[N(t-Bu)₂]₂, where M is Mn, Fe, Co, or Ni. Crystallographic studies show that the M-N distances decrease across the series: 1.9365 (Mn), 1.8790 (Fe), 1.845 (Co), 1.798 Å …
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Spectroscopic and Kinetic Study of Copper-Exchanged Zeolites for the Selective Catalytic Reduction of NOx with Ammonia
… under various oxidizing conditions in SCR were a two-coordinate Cu(I) and four-coordinate Cu(II). From these observations, we proposed a redox cycle between isolated Cu(I) and isolated Cu(II). To probe this redox cycle and refute other hypotheses, the proposed half-reactions were removed in order …
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Signal Modeling and Data Reduction for Wireless Brain-Machine Interfaces
… relationship as a linear transformation between two coordinate systems and show that given that a training procedure is introduced at the time of electrode insertion, future electrode movements can be estimated directly from the feature space representation of spikes. Paper VI presents a new, …