Thesis (Ph. D.)--California Institute of Technology, 1994. UM #94-27,313. / Advisor names found in the Acknowledgements pages of the thesis. Title from home page. Viewed 01/14/2010. Includes bibliographical references.

Thesis (Ph. D.) -- California Institute of Technology, 2010. / Title from home page (viewed 03/04/2010). Advisor and committee chair names found in the thesis' metadata record in the digital repository. Degree awarded 2010. Includes bibliographical references.

Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

No description available.

No description available.

Thesis (Ph. D.)--Columbia University, 1936. / Vita. "Literature references": p. 76-77.

Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1928. / The entire thesis text is included in file. Typescript. Illustrated by author. Title from title screen of thesis/dissertation PDF file (viewed October 21, 2009) Includes bibliographical references.

Iron polychlorophthalocyanine (FePc(Cl)₁₆) and tetrasulfophthalocyanine ([M¹¹TSPc]⁴) complexes of iron, cobalt and manganese are employed as catalysts for the oxidation of cyclohexane using tert-butyl hydroperoxide (TBHP), chloroperoxybenzoic acid (CPBA) and hydrogen peroxide as oxidants. Catalysis using the FePc(Cl)₁₆ was performed in a dimethylformamide:dichloromethane (3 :7) solvent mixture. For the [Fe¹¹TSPc]⁴⁻, [Co¹¹TSPc]⁻ and [Mn¹¹TSPc]⁴⁻catalysts, a water:methanol (1:9) mixture was employed. The products of the catalysis are cyclohexanone, cyclohexanol and cyclohexanediol. The relative percentage yields, percentage selectivity and overall percentage conversion of the products depended on types of oxidant, or catalyst, concentrations of substrate or catalysts and temperature. TBHP was found to be the best oxidant since minimal destruction of the catalyst and higher selectivity in the products were observed when this oxidant was employed. Of the four catalysts investigated [Fe¹¹TSPc]⁴⁻ yielded the highest overall percentage conversion of 20%.The mechanism of the oxidation of cyclohexane in the presence of the FePc(Cl)₁₆ and [M¹¹TSPc]⁴⁻ involves the oxidation of these catalysts, forming an Fe(IlI) phthalocyanine species as an intermediate. Electrocatalysis using [Co¹¹TSPc]⁴⁻ as catalyst, employed an aqueous pH 7 buffer medium for electro-oxidation of 4-pentenoic acid. An enone is suggested as the only oxidation product of 4-pentenoic acid. No degradation of [Co¹¹TSPc]⁴⁻ was observed during the electrocatalytic process. In this process water was used as a source of oxygen therefore eliminating the production of by products from oxidant as in the case of TBHP and CPBA. This system was studied In an attempt to set up conditions for alkane electrocatalytic oxidation.

An investigation has been made of the pyrolysis of n-pentane, isopentane and neo-pentane in a static system at temperatures near 500°C. Both uninhibited and inhibited reactions were investigated. Of principal concern has been the effect of variation of initial pressure of hydrocarbon on the decomposition products for the uninhibited reaction. The effect of variation in surface-to-volume ratio on rates and on the distribution of the products has been also a point of concern. Structural effects on rates as well as the variation of energy of activation and frequency factors with pressure have been considered of importance. Investigations of orders of reaction provide information as far as the mechanism is concerned. As a final point the most important task for the uninhibited reaction was a mechanism explaining the results obtained, and offering logical reasons for the similarities and differences between the isomeric pentanes. For the inhibited reaction the points of principal concern considered have been: the effect of nitric oxide on the product distribution; the effect of packing on both rates and products, the behavior of NO. The investigation has as a main purpose to determine whether the role of nitric oxic5e as an inhibitor involves homogeneous or heterogeneous reactions. Whether NO was consumed or not was also an important question. As a final point a mechanism is also proposed for inhibited reactions which accounts for the experimental results and attempts to give a logical explanation of the inhibition phenomenon. / Science, Faculty of / Chemistry, Department of / Graduate

The solubility of a long chain paraffin hydrocarbon (C₂₆H₅₈) over a temperature range of 75° has been measured in acetic, propionic and ethyl butyric acids. The phase relationship for the acetic acid - hexacosane system differs considerably from that of the other two. The results show that propionic acid is the best solvent to use for recrystallization and purification of a long chain hydrocarbon. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate