Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. Includes bibliographical references.

Different diphosphine ligands having the structure shown below have been studied for carbonylation and hydroformylation reactions. Depending on the substituent on the phosphorus atoms the electronic and steric properties can be tuned to direct the reaction towards the desired products. Palladium methoxycarbonylation of a large variety of unsaturated compounds has been attempted under very different conditions. The outcome of these reactions was the achievement of the linear products with a selectivity higher than 99.5 % under mild conditions of pressure and temperature. Chloroaromatic compounds have also been employed as substrates in methoxycarbonylation reactions. Unexpected results were observed since carbonylation was possible only when a strong electron withdrawing group was present. The origin of the many side products from these reactions has been elucidated. Rhodium hydroformylation was not as successful as palladium Methoxycarbonylation since relatively severe conditions had to be used to get good rates and good selectivity. In no case were there as good as those obtained in the carbonylation reactions. However, unusual factors, such as the presence of chlorine in the reaction media, have been found to influence either the conversion or the selectivity.

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Thèse doctorat : Chimie : Strasbourg 1 : 2006. / Titre provenant de l'écran-titre. Notes bibliogr.

Thesis (Ph. D.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 222-236).

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references. Also available in electronic version.

Bis(diphenylphosphino)amine (PNP) ligands, prepared from (S)-(-)-1-methylbenzyl amine, (-)-cis-myrtanylamine, (S)-(-)-1,1-napthyl(ethyl)amine (PNP1 1a, PNP2 1b, and PNP3 1c respectively) and their cobalt carbonyl complexes are reported. In the absence of alkynes the PNP ligands chelate to the cobalt rather than bridging the two cobalt centers. Although the PNP ligands are chiral the crystal structures are best solved in centrosymmetric space groups with disorder at the chiral carbon with the exception of (PNP3)Co2(CO)6, 2c, which is solved in a non-centrosymmetric space group. When the PNP ligand chelates to cobalt, as in 2, the compounds show activity for the catalytic Pauson-Khand reaction, whereas when the PNP ligand bridges, as in 3, the reaction precedes stiochiometrically. The use of these chiral ligands has not yet resulted in enantioselective catalytic Pauson-Khand cycloadditions. However, a small 15% e.e. was detected for the stiochiometric Pauson-Khand cycloaddition with 3c as the metal substrate. / Master of Science

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

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves 150-159). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 1997. / Typescript. Vita. Includes bibliographical references (leaves 150-159). Also available on the Internet.