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High Temperature Enthalpies of the Lead Halides: Enthalpies and Entropies of Fusion
The objectives of this investigation were: 1. To establish calorimetrically the transition temperature for the orthorhombic to cubic transition exhibited by PbF₂ and to determine the enthalpy of this transition. 2. To determine if the solid-solid phase transitions claimed in the literature for PbCl₂, PbF₂, PbBr₂, and PbI₂ were of thermodynamic importance, and if so, to determine the enthalpies of transition. 3. To determine if the discontinuous thermal expansions reported by Hsu for the lead halides were of thermodynamic importance. 4. To obtain reliable heat content data for the lead halides in both the solid and liquid states.
Date:
June 1970
Creator:
Linsey, Clarence W.
System:
The UNT Digital Library
The Stereochemistry and Mechanism of Alkylhaloketene-Olefin Cycloadditions
The objectives of this research problem was to employ alkylhaloketene-olefin isomer distributions to aid in understanding the stereochemistry and mechanism of alkylhaloketene-olefin cycloadditions.
Date:
June 1970
Creator:
Roe, Robert, 1934-
System:
The UNT Digital Library
The Crystal and Molecular Structures of 8-Hydroxyquinoline-N-Oxide and 2-Hydroxymethylpyridine-N-Oxide
This dissertation looked at the crystal structure analysis of 2-hydroxymethylpyridine-N-oxide sine this compound could provide data on both substituent effects and hydrogen bonding.
Date:
June 1970
Creator:
Terry, John Christopher
System:
The UNT Digital Library