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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.
21

Experimental and theoretical studies of hydrogen bonding.

Bricknell, Bradley Colin. January 1995 (has links)
The theoretical and experimental work in this thesis is primarily aimed at i) the quantification of the strengths of a number of hydrogen bonded systems, and ii) exploring the relationships that exist between the various physico-chemical properties determined in this study, which are related to the hydrogen bonding phenomenon. To this end a three part study of some hydrogen bonded systems has been undertaken. The study involves using a number of theoretical and experimental procedures, including a theoretical ab initio molecular orbital study, infrared spectroscopic determinations and a thermodynamic investigation involving measuring enthalpies and volumes of mixing and applying a theoretical model of interacting liquid mixtures. Conclusions based on ab initio molecular orbital theory, thermodynamic and infrared spectroscopic results conducted in this work include: i) the proton donating ability of the three hydrogen donor moieties studied in this work decreases in the order O-H > N-H ~ S-H, ii) the proton accepting competence of the three electron donor atoms considered in this work decreases in the order N > 0 > S in all cases except in the liquid phase systems involving dipropylamine and propane-1-thiol as proton donors, where the proton accepting ability of the atoms is in the opposite order i.e. S > 0 > N, and iii) a direct correlation exists between the shift in the A-H stretching wavenumber and the hydrogen bond interaction energy. . Although a number of factors influence the stability of the hydrogen bond, it was also tentatively concluded that in liquid phase systems involving weakly self-associated hydrogen bond donor molecules, the available surface area of the proton accepting atom becomes the dominant strength determining factor, otherwise factors such as basicity and electronegativity dominate. / Thesis (Ph.D.)-University of Natal, Durban, 1995
22

Effect of intermolecular hydrogen bonding on the micro-mechanical properties of high performance organic fibers

Leal Ayala, Angel Andres. January 2008 (has links)
Thesis (Ph.D.)--University of Delaware, 2008. / Principal faculty advisor: John W. Gillespie, Dept. of Materials Science. Includes bibliographical references.
23

Hydrogen acceptor properties of griseofulvin and related compounds,

Nakano, Naomi January 1967 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1967. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
24

Formation of hydrogen bonded complexes by amides in nonaqueous solvents

Shami, Elie Gabriel, January 1964 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1964. / Typescript. Vita. Abstracted in Dissertation abstracts, v. 25 (1964) no. 6, p. 3520. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
25

A study of offset pi-pi, C-H---O hydrogen bonding interactions and preparation of a 2-bromoglucoside

Patel, Mehul F. January 2005 (has links)
Thesis (M.S.)--Miami University, Dept. of Chemistry and Biochemistry, 2005. / Title from first page of PDF document. Document formatted into pages; contains [1], xvii, 123 p. : ill. Includes bibliographical references (p. 75-82).
26

Protein folding : new methods unveil rate-limiting structures /

Krantz, Bryan Andrew. January 2002 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of Biochemistry and Molecular Biology, August 2002. / Includes bibliographical references (p. 262-280). Also available on the Internet.
27

Femtosecond mid-infrared spectroscopy of hydrogen-bonding systems : advances in experimental and computational approaches /

Gruetzmacher, Julie Anne. January 2003 (has links)
Thesis (Ph. D.)--University of Chicago, Dept. of Chemistry, March 2003. / Includes bibliographical references. Also available on the Internet.
28

A photoionization study of hydrogen bound clusters in a supersonic molecular beam

Cook, Kelsey Donald. January 1978 (has links)
Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 165-174).
29

The role of hydrogen bonding in polyurethane and polyamide polymers

Spencer, Bruce. January 1978 (has links)
Thesis (M.S.)--Wisconsin. / Includes bibliographical references (leaves 203-206).
30

Hydrogen bonding and solubility in nonaqueous systems

Chulkaratana, Sunis, January 1964 (has links)
Thesis (Ph. D.)--University of Wisconsin, 1964. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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