A Method of X-Ray Intensity Measurement and the Structures of Some Tropolones

Macintyre, Walter MacNeil (1958) A Method of X-Ray Intensity Measurement and the Structures of Some Tropolones. PhD thesis, University of Glasgow.

Abstract

Part I: A new photographic method for the measurement of the intensities of X-ray diffraction spectra is described. In principle it is similar to the positive print method, but photographic reversal is used instead of printing. Film processing conditions are given. The accuracy of this method is compared with that of the visual estimation technique. Part II: Crystallographic studies on three tropolones are described. Using new data, the (hko) projection in copper tropolone was refined. Atomic coordinates and anisotropic thermal parameters were refined by least squares using an IBM 704 computer. The results, while not conclusive, question the regularity of the tropolone ring in this molecule. A crystallographic study of the (hol) zone of cupric nootkatin was carried out. This zone is completely phase determined. This analysis confirmed the structure proposed earlier by Campbell from a study of the (okl) zone which is not entirely phase determined. The unit cell dimensions and the space group of (beta-methyltropolone methyl ether are recorded. There is a unity to the thesis which is not apparent from the above. Part I was undertaken because of conflicting results obtained in the measurements of the intensities from Copper tropolone. The new and independent method of measurement decided unambiguously in favor of one of the sets of measurements. This was the set used in the refinement.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Keywords: Analytical chemistry, Physical chemistry
• Date of Award: 1958
• Depositing User: Enlighten Team
• Unique ID: glathesis:1958-79281
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 05 Mar 2020 11:07
• Last Modified: 05 Mar 2020 11:07
• URI: https://theses.gla.ac.uk/id/eprint/79281