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The ionization potentials of the CH20H and (CH3)2N radicals have been determined directly as e 8-14f0-15 eV and < 9-42f0.1 eV respectively. The heats of formation of the radicals were < -8.4f3 kcal mole-1 and < 30.3 kcal mole-1 respectively. Calculations have been made of several relevant bond dissociation energies.As a result of dissociative ionization studies on compounds containing the CH20H group the ionization potential of the CHzOH radical has been indirectly determined as 8.2 eV and E 7.9 eV , . AH,(CH,OH) was derived from these values giving about -9.2 and -8.0 kcal mole-' respectively. Kinetic measurements have given AH,(CH,OH) < -8-0 kcal mole-'. Conflicting results have been obtained by Walsh and Benson who indicated that AH,(CH,OH) = -2.2 kcal mole-I. on substituted hydrazines suggested that substitution of methyl for hydrogen in hydrazine increased the N-N bond dissociation energy. However, Majer et aZ,6 using thermochemical arguments, showed the opposite effect of methyl substitution. I((CH,),N) has not been determined directly but indirect estimates of ~9 . 1 eV and 9.45 eV ' have been made. AH,((CH,),N)+ is not known exactly as Collin gives 226 kcal mole-' and Majer 242 kcal mole-'.This work was directed towards obtaining values for I(CH,OH), Z((CH3),N), AH,(CH,OH), AH,((CH,),N) and redetermining AH,((CH,),N)+.

A series of fuel products was generated experimentally by hydroprocessing synthetic crude middle distillates produced by fluid-bed coking of Athabasca bitumen. Reactions were carried out over a sulfided nickel-tungsten on -alumina catalyst at severe operating pressures. The ignition quality of fuel products was determined by a series of tests using a standard cetane engine. The compositional analyses of the fuels were determined by low-resolution mass spectrometry, and aromatic carbon content was determined by 13C NMR. Fuel Ignition properties were related to the concentrations of aromatics, and comparisons were made of diesel products from fluid and from delayed coking of bitumen. The amount of hydrogen consumed was calculated from mass spectrometry data and correlated with the degree of cetane improvement. Fuel quality enhancement by aromatics saturation is discussed with reference to an alternative upgrading procedure involving ring-opening of naphthenes.

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