Thesis (Ph. D.)--University of Rhode Island, 2004. / Typescript. Includes bibliographical references (leaves 302-314).

Inaug.-diss.--Giessen. / Lebenslauf.

by Lin Jun. / "Nov. 28, 2000." / Thesis (Ph.D.)--Chinese University of Hong Kong, 2000. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

Thesis--M. Sc.(Eng.), University of Hong Kong. / Mimeographed.

No description available.

Thesis (Ph. D.)--Oregon State University, 2009. / Printout. Includes bibliographical references. Also available on the World Wide Web.

The work in this thesis is concerned with alkylammonium chlorocuprates and their solid solutions. The stoichiometries and structures of various chlorocuprate anions are considered in terms of the influence of the size and shape of the cation on the compounds formed. The determination of the structure of (Me3NH)3 Cu2 C17 by X-ray crystallography is described; it is unusual because it contains two distinct chlorocuprate anions, CUC14 2-tetrahedra and (CUC13-)n chains. The symmetry of the CuC142- tetrahedron is approximately C3v, and this is attributed to the effect of the packing of (CuC13-)n chains, together with interactions between CuC142- and the cations. The CuC12- 2- 2- 4 ion in this compound is replaceable by CoC14 and ZnC14 ' while the (CuC13-)n chains are not disturbed. This led to a consideration of the possible effects of replacing the Jahn-Teller distorted ion in simple tetrachlorocuprates by ions not affected by this distortion, and hence to the preparation of solid 'solutions A2 (M,M' )C14. The formation of solid solutions from a system of two salts having a common ion and a solvent is discussed, with particular emphasis on systems which deviate from ideal behaviour. The preparations of solid solutions (Me4N)2(Cu,Co)C14, (Me4N)2(Cu,Zn)C14 and Me4N)2(Co,Zn)Cl4 from ethanol and water are described, and related to the general conditions for solid solution formation. Solid solutions (Me3NH)3Cu(Cu,Co)C17 are also given. Differential scanning calorimetry has been used in an attempt to elucidate the nature of the thermal transitions in (Me4N)2MC14 and in the solid solutions. The crystal structures of (Me4N)2CuC14, and (Me4N)2(Cu,Co)C14 (Cu:Co = 1:1) have been determined, and compared with that of (Me4N)2CoC14' It has been . 2- 2- shown that CuC14 and CoC14 each retain their characteristic configuration in the solid solution, so that CuC142- is the more distorted, because of the Jahn-Teller effect.

No description available.

No description available.

In order to try to explain some of the rather surprising features of reactions in frozen solutions, four different systems are extensively studied. They are the reaction of methyl iodide with triethylamine to form the quaternary ammonium salt in frozen benzene, the base catalyzed decomposition of t-butyl-peroxy formate to carbon dioxide and t-butyl alcohol in frozen p-xylene, the reaction of ethylene chlorohydrin with hydroxide ion to form ethylene oxide in frozen aqueous solution and the mutarotation of glucose in ice. In addition, a demonstration experiment is presented in which iodide ion is oxidized to iodine by arsenic acid in frozen aqueous solution. Several new features of reactions in frozen solutions are reported; including a maximum in the rate - temperature dependence curve, rate enhancements as large as 1000 - fold over reaction in unfrozen solutions and shifts in the equilibrium position. Kinetic equations are developed which correlate all of the results and which also explain some of the observations of other investigators. These equations are based upon the assumptions that (1) when a solution containing reactive species is frozen all of the reactants as well as any other solutes present are rejected by the crystallizing solvent and are concentrated into regions which remain liquid and that (2) the reaction proceeds normally in these regions. The fundamental equation used for correlating the rate data for the second-order reactions studied is, [formula omitted] where Vn is the total volume of the liquid regions, mA is the total moles of reactant A present in the system at any time and Ah and Bh are the concentrations of the reactants A and B in the liquid regions. The ideas developed for the treatment of reactions in frozen solutions are extended to reactions in organic solids which have a melted phase present. This treatment accounts qualitatively for the observations made on mutarotation in solid glucose. The application of the method to the isomerization of 5-norbornene-2,3-endo-dicarboxylic/anhydride to the exo-isomer allows separation of concurrent reactions in the melt and in the solid. / Science, Faculty of / Chemistry, Department of / Graduate