Thesis (Ph. D.)--University of Illinois, 1916. / Vita.

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 250-264).

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[No abstract available] / Science, Faculty of / Chemistry, Department of / Graduate

[No abstract submitted] / Science, Faculty of / Chemistry, Department of / Graduate

Analysis of the Basic Residues from a series of rare earth double magnesium nitrates indicated the possibility of the presence of II in the material. A new method of preparation of rare earth bromates proposed by Moeller & Kremers (18) was proved satisfactory. / Science, Faculty of / Chemistry, Department of / Graduate

The preparation of the oxides of the cerium and yttrium sub-groups is discussed, and a new method is proposed for the preparation of rare earth bromates, involving the use of calcium bromate instead of barium bromate. The solubility of calcium bromate was measured roughly, and was found to be 102.5 gms per 100 ml of saturated solution at 19°C. / Science, Faculty of / Chemistry, Department of / Graduate

The excited states of Gd 154 obtained from the decay of Eu 154 have been investigated. Precise measurements of the energies and intensities of the gamma transitions have been made, using Lithium-drifted Germanium detectors. A revised decay scheme is presented in which all the gamma transitional energies agree with the corresponding energy differences between levels to within 1 Kev. A 1263.3 Kev level is established by the presence of a gamma transition of 892.7 Kev. Two other gamma transitions of energies, 903.6 Kev and 582.1 Kev from the negative-parity levels to the 2⁺ beta excited level have also been discovered. The proper locations of the 995.9 Kev and 1004.5 Kev in the decay scheme are confirmed by a gamma-gamma coincidence method using a Germanium detector and a NaI(Tl) scintillator. The energies and intensities of the internal conversion electrons and the beta transitions have been measured by an intermediate image spectrometer. Their values are quite consistent with the established decay scheme. Theoretical values of the energy levels and the branching ratios for gamma transitions have been calculated, using the Asymmetric Rotator Model (J.P. Davidson's treatment). The 'stiffness' parameter of the nucleus µ and its asymmetry parameter γ obtained are 0.402 and 11.52 degrees respectively. Comparison of the experimental and theoretical energies of seven positive-parity levels gives a root-mean-square deviation of 1.5 %. Three out of the four experimental branching ratios are in good agreement with the theoretical values. The monopole transition probability for the transition from the 0⁺ beta excited state to the 0⁺ ground state measured also agrees with the present theoretical calculation. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

The infrared and proton magnetic resonance spectra of a number of compounds containing sites of Lewis basicity change in the presence of selected cyclopentadienyllanthanides, R3Ln. These spectral changes indicate that the lanthanide derivatives can act as Lewis acids towards bases such as bridging and terminal carbonyl ligands, terminal nitrosyl ligands, appropriate transition metals and a carbon-carbon triple bond. Several solid adducts can be isolated and characterized. The preparation of the new compounds R2LnM(_5-Cp)(C0)3 [Ln = Dy, Ho, Er or Yb; M = Mo or W] is described, and evidence for the existence of isocarbonyl linkages in these complexes is presented. As a synthetic route to compounds containing apparent lanthanide-transition element bonds, the direct reaction of elemental metals with transition metal organometal1ics is studied. Finely divided lanthanide and other metals react with substrates such as Mn(C0)5Br, (3-C3H5)Fe(C0)3I, [(5-Cp)Mo(C0)3]2 and (5-Cp)Cr(C0)3HgCl in THF to yield extremely reactive, air- and moisture-sensitive solutions. Some of the chemistry of these solutions and other synthetic approaches to them are outlined. The versatility of these solutions as reactive intermediates during the preparation of organometallic compounds is described. / Arts, Faculty of / Philosophy, Department of / Graduate