Typescript (Photocopy) / Includes bibliographical references / xix, 290 leaves : ill ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Physical and Inorganic Chemistry, University of Adelaide, 1989

Thesis (M.Sc.) -- University of Adelaide, Dept. of Organic Chemistry, 1975.

No description available.

The keytones are representative of one of the large groups of compounds of Organic Chemistry. Phenyl-methyl-ketone is the simplest representative of the mixed aliphatic-aromatic ketones. It is a member of a group of compounds which are soporific and hypnotic and are used in medicine as sleep producers and sedatives. It is found to a small extent in coal tar. It has basic properties and is extracted from the heavy oil of coal tar with sulfuric acid. The purpose of this research is to synthesize one of the compounds which is not present in the compilation of the natural lists and to investigate its properties. The compound that is the focus of this research is acetyl acetophenone. It is next to phenyl-methyl-ketone in the group of mixed aliphatic-aromatic ketones. The relation between these two compounds can best be shown by their structural formulae: PHENYL-METHYL-KETONE [see PDF file for formula] [see PDF file for formula] ACETHYL ACETOPHEMONE

published_or_final_version / abstract / Chemistry / Doctoral / Doctor of Philosophy

This work describes the measurement of hyperfine structure in a series of deuterated acetylenes via molecular-beam microwave spectroscopy. Measurements of spin-rotation constants were used to calculate the paramagnetic contribution to the chemical shielding of the concerned nucleus. Where possible, comparisons with NMR measurements were made. Measurements of the deuterium quadrupole coupling determined in this work are compared with previous measurements on the same or similar systems. A review of the theoretical work done in this area is presented as well as a discussion of trends observed from high precision measurements of deuterium quadrupole coupling. A computer program that calculates hyperfine structure for up to four coupling nuclei of arbitrary spin is presented.

Six bis(silyl)acetylenes with the following varied silicon substituents were prepared: I (Me, Me); II (H, H); III (Cl, H); IV (Cl, Cl); V (OMe, H); VI (OMe, OMe). While I and II may be prepared by the reaction of dilithio- or bis(bromomagnesium)-acetylide with appropriate chlorosilane, similar reactions designed to give III - VI give oligomers, YMe_2Si(C≡C-SiMe_2)_nY, VII, Y = Cl, OMe, as the major products indicating that the acetylenic functionality on silicon activates the chlorosilane toward nucleophilic substitution. Compounds III and IV were prepared by free radical chlorination of II. Methanolysis of III and IV gave quantitative yields of V and VI, respectively. In the presence of mineral acid, VI readily cyclized to give high yields of the cyclic siloxane octamethyl-4,9-dioxa-3,5,8,10-tetrasila-cyclodeca-1,6-diyne, VIII, and the analogous triyne, IX. It was determined that V and VI could be prepared directly from II in high yield by methanolysis with palladium catalyst. Vaska's complex also accomplished the conversion. I attempted to prepare bis(ethoxydimethylsilyl)acetylene by using of Wilkinson 's catalyst for hydrosilylation with acetaldehyde. The principal product of this reaction was 1-(dimethylsilyl)-3,5,5-trimethyl-4-oxa-3-silacyclopent-1-ene, XI.

Thesis (Ph. D.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.

Thesis--Ph. D., University of Hong Kong, 1983.

published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy