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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.
41

The photochemistry and 1,3-dipolar cycloadditions of 4-azidopyridine-N-oxide

Hostetler, Katherine J. January 2005 (has links)
We have investigated the chemistry of 4-azidopyridine-N-oxide. One aspect of this thesis involved the photolysis of this azido heteroaromatic-N-oxide, to generate highly reactive nitrene intermediates. We have studied these intermediates and determined that the intermediates vary significantly in structure and reactivity from those of simpler phenyl and pyridyl systems. This study yields new insight into the structure, bonding, and energetics of nitrene species.The nitrene intermediate originating from this azide has features which could in the future help in synthetic practices and photoaffinity studies. It may aid in photoaffinity studies due to the fact that the N-oxide group imparts water solubility.This thesis investigates the premise that a change in the electronic nature of the aromatic ring results in a change in the systems reactivity. We are interested in whether changes in the nature of the ring in the azides induce large changes in the chemistry, and if so, whether they do so in a predictable manner.Another focus of the research involved 1,3-dipolar cycloaddition reactions with an azide, where a carbon-carbon double or triple bond will attach to an aromatic azide, 4-azidopyridine-N-oxide in this case, at the azido group (-N3) to generate new ring compounds. 1,3-dipolar cycloadditions are fascinating because the mechanism which takes place in the attachment phase is still under debate. These reactions were investigated by reacting 4-azidopyridine-N-oxide with an unsaturated compound (alkene or alkyne) and then analyzing the product mixtures by HPLC methods. / Department of Chemistry
42

The 4-propylpyridine complexes of cobalt (II) isothiocyanate in nonaqueous solutions : a thermodynamic study.

Wong, Joseph Yik Nang. January 1968 (has links)
No description available.
43

Syntheses and reactions of imidazo [1,2-a] pyridines.

Valentin, Kazimir. January 1966 (has links)
No description available.
44

Terpyridine complexes of rhodium (I, III)

Pater, Boke Chan de, January 2003 (has links)
Proefschrift Universiteit van Amsterdam. / Met lit. opg. - Met samenvatting in het Nederlands.
45

One step copper-catalyzed functionalization of pyridines with alkynes and organoindium reagents

Beveridge, Ramsay E. January 1900 (has links)
Thesis (M.Sc.). / Written for the Dept. of Chemistry. Title from title page of PDF (viewed 2008/01/15). Includes bibliographical references.
46

Factors affecting liver pyridine nucleotide concentration in the hyperthyroid animal

Bosch, Arthur James, January 1958 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
47

Syntheses and physical properties of polymers based on 2,2'-bipyridine dicarboxylic acid and pyridine-2,6-dicarboxylic acid /

Yu, Sze-chit. January 1999 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references.
48

Luminescent organoplatinum chemistry : photophysical and supramolecular properties of metallacyclic and polypyridine platinum(II) complexes /

Lai, Siu-wai. January 1999 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references.
49

Synthesis and light emitting properties of poly(phenylenevinylene)s incorporated with pendant ruthenium polypyridine complexes /

Wong, Chi-tak. January 2000 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2000. / Includes bibliographical references (leaf 158).
50

The absorption spectra of the aminopyridines. The absorption spectra of some methylpyridine derivatives.

Seeger, Nelson Vernard, Anderson, Leigh Charles, January 1949 (has links)
N.V. Seeger's Thesis--University of Michigan. / Two articles, by L.C. Anderson and N.V. Seeger, reprinted from the Journal of the American Chemical Society, v. 71, no. 1, Jan. 1949.

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