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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.
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Showing 511 to 520 of 2974 (0.016 seconds)| 511 |
Nitroso derivatives of l,3-dithiol-2-ylidenes, and related systemsChalton, Michael Allen January 1996 (has links)
A range of substituted l,3-dithiol-2-ylidene systems have been prepared. These species have, subsequently, been converted to nitroso derivatives. The role of the 4-, 5- and ylidene subtituents in stabilising the nitroso-alkene moiety thus obtained has been investigated. X-ray molecular crystal data which show that these species are stabilised by intramolecular interactions are presented. Conversion of the nitroso derivatives to their thionitroso analogues has been attempted, but was unsuccessful. A selection of l-(l,3-dithiol-2-ylidene)-prop-2-ene systems have been prepared. These systems have been shown to be sufficiently activated to undergo nitrosation reactions at the 3-vinyl positon, though the nitroso-alkenes thus formed are unstable. A new route to 4,5-dicarbomethoxy-2-(tributylphosphino)-l,3-diselenolium tetrafluoroborate utilising hydrogen selenide as the source of selenium has been detailed. This Wittig reagent has been employed in the synthesis of various 1,3-diselenol-ylidene systems. Conversion to nitroso derivatives has been accomplised and X-ray data shows that the resultant nitroso-alkenes are stabilised by an intramolecular oxygen—selenium interaction.
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A study of 1,3-dipolar cycloadditions as a route to novel pesticidesFarouk, Sultan January 1994 (has links)
No description available.
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| 513 |
Calorimetry of 'red-oil reactions'Glossop, Michael William January 1999 (has links)
No description available.
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| 514 |
The reactions of reactive dyes with woolBennett, C. January 1980 (has links)
No description available.
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| 515 |
Nuclear systematics for Z = 52.Richard, Gilles Bissonnet. January 1969 (has links)
No description available.
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| 516 |
Neutron and deuteron transfer reactions in the A = 100 mass region.Schoonover, John Lodge January 1973 (has links)
No description available.
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Solvation and solvent exchange studies of metal ions in solution : a nuclear magnetic resonance studyCrea, Joseph January 1976 (has links)
vi, 164 leaves : ill. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physical and Inorganic Chemistry, 1977
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| 518 |
Synthesis and properties of some 2,5-dihydrothiophene 1,1-dioxides /Yen, Teh Fu, January 1955 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute, 1955. / Vita. Abstract. Includes bibliographical references (leaves 266-285). Also available via the Internet.
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| 519 |
Carbon kinetic isotope effects in the gas-phase reactions of nonmethane hydrocarbons with hydroxyl radicals and chlorine atoms /Anderson, Rebecca S. January 2005 (has links)
Thesis (Ph.D.)--York University, 2005. Graduate Programme in Chemistry. / Typescript. Includes bibliographical references (leaves 178-194). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR11544
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| 520 |
Orientational control of chemical reactivity in liquid crystalline solvents.Mitchell, David Scott. Leigh, W. J. Unknown Date (has links)
Thesis (Ph. D.)--McMaster University (Canada), 1990. / Source: Dissertation Abstracts International, Volume: 53-01, Section: B, page: 0285. Supervisor: W.J. Leigh.
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