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Thesis (Ph. D.)--Columbia University, 1946. / Vita. Bibliography: p. 61.

A dark red resin was isolated from the reaction mixture obtained by treatment of quinoline hydrochloride with zinc dust. Indications, from chromatographic studies of the resin, that it contained a number of different components led to extensive investigations of methods of separation. Satisfactory separation of the resin into pure components was finally achieved by a scheme which essentially involved fractional extraction and fractional adsorption-desorption. Three pure components were isolated, and characterized by chemical and physical analyses. Two of the components were suggested as heterocyclic compounds of quinoline probably of polymeric nature. The third component appeared to be an aniline type compound resulting from reductive cleavage of quinoline. Ultra-violet spectra of the isolated pure components supported the deductions made from chemical and other physical evidence. / Science, Faculty of / Chemistry, Department of / Graduate

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Thesis (M.S.)--University of Montana, 2008. / Title from title screen. Description based on contents viewed Oct. 3, 2008. Includes bibliographical references (p. 87-90).

In a series ofpreIiminary studies of urea-formaldehyde reactions, the influence of the U:F molar ratio, the temperature and the catalyst were investigated. Subsequently, in a more rigorous evaluation of the influence of four variables on urea-formaldehyde resin formation, viz., U:F molar ratio, pH, temperature and reaction time, a set of twenty reactions were performed using a statistical approach. The results indicate that high resin viscosity is best achieved by using a high U:F molar ratio (1:2) and conducting the reaction at 90°C. Several basic components produced in urea-formaldehyde reactions have been synthesised, characterised by NMR spectroscopy, silylated using bis(trimethylsilyl)trifluoroacetamide and analysed by low resolution mass spectrometry. The use oftriazones as cross-linking agents has been investigated, and a series of 5-substituted triazones have been prepared and their mass fragmentation patterns explored using a combination of low and high resolution mass spectrometry. In order to facilitate interpretation of ¹³C NMR data obtained for U-F resins, internal rotation in various urea derivatives was investigated using variable temperature ¹H and ¹³C NMR spectroscopic study. Signal splittings observed below 247 K have been rationalised in terms of various rotameric structures.

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