Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"Structure and Bonding"”.
-
Structure and bonding: The synthesis and characterization of heteronuclear clusters
The reaction of $\rm NaAsO\sb2, TeO\sb2$, and $\rm SeO\sb2$ with methanolic solutions of KOH and $\rm Fe(CO)\sb5$ produces the isoelectronic clusters ($\rm HAs\{Fe(CO)\sb4\}\sb3\rbrack\sp{2-}, \lbrack Te\{Fe(CO)\sb4\}\sb3\rbrack\sp{2-}$, and $\rm \lbrack Se\{Fe(CO)\sb4\}\sb3\rbrack\sp{2-}$. The …
-
Structure and Bonding in Group II and III Organometallic Chemistry
Made available in DSpace on 2014-12-09T17:36:08Z (GMT). No. of bitstreams: 1 6910631.pdf: 4337217 bytes, checksum: 1ea7688b239b4c35153223795bde72ec (MD5) Previous issue date: 1968
-
Modern spectroscopy on biological molecules : structure and bonding investigated by THz time-domain and transient phase-grating spectroscopy
… spectral regime started only <br>recently, and the work presented in this thesis represents one of the first investigations along this line. <br> <br>We present characteristic THz spectra of individual biomolecular systems in the crystalline and amorphous phase. In particular the correlation …
-
An investigation into the flotation response of sperrylite (PtAs2) by comparative evaluation of crystal structure and bonding atoms
… to be slow floating compared to the other PGMs and often reports to the tailings stream. Sperrylite comprises about ~21% of the platinum groups minerals (PGMs) in the Platreef ore hence, improving its recovery will be of great economic value to the South African PGM industry. The flotation of …
-
General method for the development of models of electronic structure and bonding: covalent bonds, recoupled pair bonds and through-pair interactions
… of the chemical bond is essential to our understanding of molecular phenomena. G. N. Lewis laid the groundwork for our understanding of chemical bonds nearly a century ago in his classic 1916 paper in the Journal of the American Chemical Society, “The Atom and the Molecule.” This model was given …
-
A Computational Investigation of the Photophysical, Electronic and Bonding Properties of Exciplex-Forming Van der Waals Systems
… complexes to (1) extrapolate the structure and bonding of the ground and phosphorescent states (2) determine the luminescence energies and (3) assist in difficult assignment of luminescent transitions. In the [Pt(SCN)4]2- complex, calculations determined that the major …
-
Thiocarbonyl and selenocarbonyl complexes of iridium
The results to be described and discussed in this thesis concern synthesis and reactivity of iridium(I) and (III) complexes containing thiocarbonyl or selenocarbonyl ligands. Chapter 1 comprises: a review of Vaska's compound, IrCl(CO) (PPh3)2 and related species, covering syntheses, structure and …
-
Exploiting imidate ligand effects in transition metal-mediated C-C bond forming processes
… of substituting (pseudo)halide for imidate ligands in Au(I) and Au(III) ([AuBr(NHC)] and [AuBr3(NHC)]), Ru(II) ([RuCl2(CHR)(L2)]) and Pd(II) ([Pd(OAc)2]) complexes has been investigated. The activity of these complexes as (pre)catalysts in enyne cycloisomerisation and propargylic nucleophilic …
-
Ab Initio Study of Amorphous Zeolitic Imidazolate Framework (A-ZIF) and Pyrophosphate crystals
… (a-ZIF) model from a near-perfect continuous random network model of a-SiO₂. The radial distribution function is in good agreement with measurements for amorphous aTZIF-4 but with notable fine differences. We confirm the retention of the metal tetrahedral bonding coordination in a-ZIF and the …
-
Exploring the Synthesis, Structure, and Reactivity of Phosphorus-Chalcogen Heterocycles
… research interest due to their unique structures and unprecedented reactivity. Conversely, the area of phosphinidene chalcogenides, a low-coordinate phosphorus and chalcogen species, have yet to be thoroughly explored. In this context, this dissertation describes the synthesis of a …
-
The adsorption of organic molecules on metal and semiconductor surfaces
… First, the influence of coadsorbed CO on the structure and bonding of thiophene was investigated using a combination of LEED, AES, TPD and synchrotron-based NIXSW and NEXAFS techniques. It was found that the coadsorption of CO does not induce an ordering of the disordered chemisorbed thiophene …