Title page for ETD etd-08092005-130430


Type of Document Master's Thesis
Author Tyree, William Stuart
URN etd-08092005-130430
Title Correlation of Structure and Magnetic Properties in Charge-Transfer Salt Molecular Magnets Composed of Decamethylmetallocene Electron Donors and Organic Electron Acceptors
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Yee, Gordon T. Committee Chair
Brewer, Karen J. Committee Member
Hanson, Brian E. Committee Member
Keywords
  • metallocene-based magnets
  • charge-transfer salt magnets
  • molecular magnets
  • through-space coupling
Date of Defense 2005-08-02
Availability unrestricted
Abstract
Di-n-propyl dicyanofumarate (DnPrDCF) and di-isopropyl dicyanofumarate (DiPrDCF) have been used as one-electron acceptors in the synthesis of charge-transfer salt magnets with decamethylmetallocenes, MCp*2 (M = Mn, Cr). Salts of each acceptor with each metallocene have been characterized and the structures of the chromium analogues have been solved. The two acceptors are structurally similar to dimethyl dicyanofumarate (DMeDCF) and diethyl dicyanofumarate (DEtDCF), which have been previously studied and found to form charge-transfer salt magnets with the aforementioned decamethylmetallocenes. A typical structural motif is present in these types of charge-transfer salts which allows for the comparison of magnetic properties based on the length or size of the alkyl group of the dialkyl dicyanofumarate. Some trends were established based on the magnetic properties of the homologous series including ordering temperature/bulkiness of the alkyl group and intrastack distances/theta values. Correlation of magnetic and structural properties may give some insight into "through-space" magnetic coupling, of which little is understood.
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