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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 pyrolysis of phosphorus-based flame retardants.

Yiu, Sai-man. January 1974 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1974. / Mimeographed.
42

Marine dissolved organic phosphorus composition insights from samples recovered using combined electrodialysis/reverse osmosis /

Jackson, Cindy. January 2009 (has links)
Thesis (M. S.)--Earth and Atmospheric Sciences, Georgia Institute of Technology, 2010. / Committee Chair: Ellery Ingall; Committee Member: Irina Sokolik; Committee Member: Josef Dufek. Part of the SMARTech Electronic Thesis and Dissertation Collection.
43

D[pi]-P[pi] bonding in organo-sulfur and organo-phosphorus compounds

Wickersham, Thomas Winder 12 1900 (has links)
No description available.
44

Conversion of Epoxides to episulfides and episelenides

Finkenbine, John Russell January 1974 (has links)
No description available.
45

Monophosphines in asymmetric catalysis

Laing, John Christopher Pettigrew January 1995 (has links)
This thesis described investigations into the synthesis and reactions of chiral monophosphines, in five chapters. Chapter 1 introduces asymmetric catalysis, Chapter 2 and 3 describe the synthesis of enantiomerically pure monophosphine via an oxide and borane route respectively. Chapter 4 describes the organometallic reactions of these monophosphines and Chapter 5 contains experimental details of the reactions. <strong>Chapter 1</strong> describes the importance of chirality and significant asymmetric processes. The literature methods of producing homochiral monophosphines are detailed. <strong>Chapter 2</strong> describes the synthesis of enantiomerically enriched monophosphine oxides. Diastereomerically pure (2R, 4S, 5R)-2-chloro-5-phenyl-3,4-dimethyl-1,3,2-oxazaphospholidine was prepared from PCl<sub>3</sub> and (-)-ephedrine. This compound was reacted with 2-adamantyl magnesium bromide to afford (2R, 4S, 5R) and (2S, 4S, 5R)-3,4-dimethyl-2-2-adamantyl-5-phenyl-1,3,2-oxazaphospholidin-2-oxide after oxidation with <sup>t</sup>BuOOH. An X-ray crystal structure was obtained of the R<sub>P</sub> diastereoisomer and a detailed NMR study carried out on the S<sub>P</sub> diastereoisomer. The R<sub>P</sub> diastereoisomer was reacted with 2-methoxyphenylmagnesium bromide to give R<sub>P</sub>-N-methyl-N-(1S,2S)-(1-methyl-2-hydroxy-2-phenyl)-ethyl-P-(2-methoxyphenyl)-P-(2-adamantyl)phosphinamide in 68% yield and 95% d.e. The ephedrinyl residue was replaced by O-methyl under acid catalysis with inversion of configuration and with >85% e.e. Displacement of the methoxy group using phenyl lithium occurred with inversion of configuration to give the corresponding phosphine oxide in 65% e.e., which could be reduced under forcing conditions using polymethylhydrosiloxane in the presence of Ti(O<sup>i</sup>Pr)<sub>4</sub>. <strong>Chapter 3</strong> describes the synthesis of enantiomerically enriched monophosphines via phosphine borane complexes. Diastereomerically pure (2R, 4S, 5R)-2,5-diphenyl-3,4-dimethyl-1,3,2-oxazaphospholidine borane was prepared directly from PhPCl<sub>2</sub> and (-)-ephedrine, followed by oxidation with BH<sub>3</sub>.Me<sub>2</sub>S. This compound reacted regiospecifically with ortho-anisyl lithium to afford the product formed by P-O cleavage with >96% d.e. and with retention of configuration at phosphorus. The ephedrinyl residue was replaced by O-methyl under acid conditions with inversion of configuration and with >98% e.e. Ferrocenyl, 1-adamantyl and tert-butyl lithium reagents displaced the methoxy group with inversion of configuration and with >92% e.e., as determined by <sup>1</sup>H NMR methods. The phosphine borane complexes were then reduced quantitatively with Et<sub>2</sub>NH with retention of configuration and with >98% e.e. <strong>Chapter 4</strong> describes the synthesis of indium and rhodium complexes of (S)-t-butyl-(2-methoxyphenyl)-phenyl phosphine and (S)-ferrocenyl-(2-methoxyphenyl)-phenyl phosphine. The iridium complexes are shown to reduce a range of prochiral olefins, including Z-methyl-2-acetylamino-3-phenylpropenoate (MAC) in up to 19% e.e. The di-(R,R)-(ferrocenyl-(2-methoxyphenyl)-phenyl phosphine) rhodium complex is more selective, reducing MAC in 54% e.e., while the rhodium complex of (S)-t-butyl-(2-methoxyphenyl)-phenyl phosphine reduces MAC in 24% e.e.
46

Reactions of selected organic, organosilicon and organophosphorus anions in the gas phase / by Richard Alfred John O'Hair.

O'Hair, Richard Alfred John January 1989 (has links)
Copies of author's previously published articles inserted. / Includes bibliographical references (leaves 193-215) / xiv, 216 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Studies the structure and reactivity of organic, organosilicon and organophosphorus anions in the gas phase. Theoretical ab initio calculations and collisional activation in a reverse geometry mass spectrometer revealed structural information and reactivity was probed using the flowing afterglow reactor. / Thesis (Ph.D.)--University of Adelaide, Dept. of Organic Chemistry, 1991
47

Chemical sensors for urea and organophosphate nerve agents

Cabrera, Sandra F. January 2006 (has links)
Thesis (Ph. D.)--University of Nevada, Reno, 2006. / "May, 2006." Includes bibliographical references. Online version available on the World Wide Web.
48

The laboratory investigation of parathion poisoning cases /

Phannee Pidetcha, January 1979 (has links) (PDF)
Thesis (M.Sc. (Forensic Science))--Mahidol University, 1979.
49

Development of a mouse model to study the role of paraoxonase (PON1) in organophosphate detoxication /

Li, Wan-Fen. January 1999 (has links)
Thesis (Ph. D.)--University of Washington, 1999. / Vita. Includes bibliographical references (leaves 83-102).
50

Reactions of alcohols and organophosphonates on tungsten trioxide epitaxial films /

Ma, Shuguo, January 2003 (has links) (PDF)
Thesis (Ph.D.) in Chemistry--University of Maine, 2003. / Includes vita. Includes bibliographical references (leaves 138-149 ).

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