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  • 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.

Electronic structure and photochemical reactivity of binuclear metal complexes

Smith, David Charles. Goddard, William A., Gray, Harry B. January 1989 (has links)
Thesis (Ph. D.)--California Institute of Technology, 1989. UM #89-15,396. / Advisor names found in the Acknowledgements pages of the thesis. Title from home page. Viewed 01/19/2010. Includes bibliographical references.

Om iridiums ammoniakaliska föreningar

Palmær, Knut Vilhelm, January 1895 (has links)
Doctor's dissertation at Upsala (Sweden) university.

NMR an hyperpolarisiertem 129Xe auf Einkristalloberflächen erste Experimente im Ultrahochvakuum an Xenonmultilagen auf einer Iridium(111)-Oberfläche /

Stahl, Dirk. January 2001 (has links) (PDF)
Marburg, Universiẗat, Diss., 2001.

The synthesis and reactivity of triangular phosphido-bridged rhodium and iridium clusters

Asseid, Fathi M. 27 May 2015 (has links)

Homogeneous hydrogenation catalysed by square planar iridium (I) complexes

Memon, Nazir Ahmed January 1967 (has links)
A study is described of the kinetics of reactions in which the complexes trans-Ir (CO)X(PPh₃)₂, where X = Cl, Br and I, are used for the catalytic homogeneous hydrogenation of olefins, in particular maleic acid. The catalytic activity is poor in benzene solutions but is enhanced in coordinating solvents such as N, N'-dimethylacetamide. The kinetics were studied by measurements of hydrogen uptake, at various experimental conditions in which iridium, olefin and hydrogen concentrations were varied. The rate-law is complex showing between zero and first order in each of iridium, substrate and hydrogen concentrations. The dependence of rate on the halogen followed the order I>Br>Cl, and quite remarkably traces of oxygen in the system enhance the hydrogenation rate considerably. Supplementary spectrophotometry studies have elucidated some of the equilibria involved and the mechanisms proposed show the importance of a solvent assisted dissociation step in making available a coordination site on the transition metal complex. A detailed path for the catalytic hydrogenation is suggested. / Science, Faculty of / Chemistry, Department of / Graduate

Radioactive decay of iridium¹⁸⁹ /

Lerohl, John Kenneth January 1962 (has links)
No description available.

The radioactive decay of iridium-186 /

Ghosh, Binayak January 1962 (has links)
No description available.

Oxidative addition of N-H and O-H bonds to iridium: developing active catalysts for N-H and O-H additions to unsaturates

Lapido, Folami Tesileem 13 October 2005 (has links)
The oxidative addition of the N-H bond of both heterocyclic and acyclic amines and the O-H bond of phenols, water and carboxylic acids to iridium(I) trimethylphosphines complexes was studied and the reactivity of the resulting hydrido amido-, aryloxo- and carboxylato iridium(III) complexes was investigated. Oxidative addition of the N-H bond of pyrrole, indole, 3-methylindole, 7-azaindole, carbazole and aniline to [Ir(COD)(PMe₃)₃]CI (<b>1a</b>) (COD = 1,5-cyclooctadiene) produces merIr( NR₂)H(PMe₃)₃CI (<b>2a-f</b>) complexes. That these amines were bound to iridium through an Ir-N bond was established by ¹H, ³¹P and ¹³C NMR spectroscopy, IR spectroscopy, C-H analyses and single crystal x-ray diffraction. Similarly, oxidative addition of the O-H bond of phenol, p-cresol, 3,5-dimethylphenol, and water to [Ir(COD)(PMe₃)₃]CI (la) produces mer-Ir(OR)H(PMe₃)₃C1 (<b>5a-c and 6</b>) which were characterized by ¹H, ³¹P and ¹³C NMR spectroscopy, C H analyses and single crystal x-ray diffraction. A preliminary study of the reactivity of both the amido and aryloxo complexes suggests that because of the increased electron affinity of the heteroatoms involved (N or 0), there is high electron density at the heteroatoms in these complexes and therefore the M-N or M-O bond can heterolyze more easily than M-C bonds. This increased tendency of the M-N or M-O bond to heterolyze leads to decomposition reactions when attempts are made to open up a coordination site at the metal center by removing the chloride ligand. / Ph. D.

The Gamma-Ray Spectra of Iridium 192 and Iridium 194

Nablo, Samuel 10 1900 (has links)
This thesis describes an investigation of the complex gamma-ray spectra accompanying the decay of iridium 192 and iridium 194. Precision energy measurements of twenty-one gamma-rays in Ir 192 and fourteen gamma-rays in Ir 194 have been made using the 50 cm. double focusing beta-ray spectrometer. In addition, the angular correlation function for the cascade gamma-rays of Ir 194 has been determined. A number of new radiations have been found In each spectrum and decay schemes are proposed for each nuclide. / Thesis / Master of Science (MS)

Studies on the coordination chemistry of iridium and platinum

Powell, N. A. January 1987 (has links)
No description available.

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