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PARAMAGNETIC RESONANCE STUDIES OF HIGH-SPIN COBALT (II) COORDINATION COMPLEXES

James, Christopher Dominic
http://orcid.org/0000-0002-6207-6380
http://rave.ohiolink.edu/etdc/view?acc_num=miami152267342524459

Abstract Details

2018, Doctor of Philosophy, Miami University, Chemistry and Biochemistry.
The cobalt (II) ion (d7) can adopt a high-spin (hs) (S = 3/2) configuration in coordination complexes, and can form four-, five-, and six-coordinate complexes. These complexes are amenable to a number of paramagnetic resonance techniques, and have applications in inorganic spectroscopy, bioinorganic chemistry, catalysis, and magnetic materials. The characterization of hs cobalt (II) coordination complexes is made challenging due to the complex electronic structure of hs cobalt (II). We have prepared a number of coordination complexes to study the electronic structure of hs cobalt (II) in detail, and to characterize five-coordinate hs cobalt (II) coordination complexes. This dissertation consists of four chapters, which investigates the solution NMR relaxation enhancements, and the electron paramagnetic resonance (EPR) of a number of five- and six-coordinate high-spin cobalt (II) coordination complexes. Chapter 2 investigates the solution 19F relaxation enhancements for high-spin (hs) cobalt (II) tris(pyrazolyl)borate complexes, coordinated to mono- and poly-fluorinated hydroxamates. Chapter 3 presents an EPR characterization of cobalt (II) in five-coordinate cobalt (II) tris(pyrazolyl)borate complexes. This chapter is composed of two sections: 1) investigating the effect of electron withdrawing chelates on the electronic structure of cobalt (II) in five-coordinate cobalt (II) tris(pyrazolyl)borate complexes, 2) investigating the effect of substituents on the electronic structure of 3,5 substituted, five-coordinate cobalt (II) tris(pyrazolyl)borate complexes. Chapter 4 presents an EPR investigation of the electronic structure of six-coordinate cobalt (II) coordination complexes.
David Tierney, PhD (Advisor)
Michael Crowder, PhD (Committee Member)
Robert McCarrick, PhD (Committee Member)
C. Scott Hartley, PhD (Committee Chair)
Luis Actis, PhD (Committee Member)
132 p.
Chemistry
EPR Spectroscopy; Paramagnetic NMR; Hydroxamic Acids; Hydroxamates; Inhibitors; High-Spin Cobalt II; trispyrazolylborate; scorpionate; paramagnetic; paramagnetic relaxation enhancements; NMR; EPR

Recommended Citations

Citations

  • James, C. D. (2018). PARAMAGNETIC RESONANCE STUDIES OF HIGH-SPIN COBALT (II) COORDINATION COMPLEXES [Doctoral dissertation, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami152267342524459

    APA Style (7th edition)

  • James, Christopher. PARAMAGNETIC RESONANCE STUDIES OF HIGH-SPIN COBALT (II) COORDINATION COMPLEXES. 2018. Miami University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami152267342524459.

    MLA Style (8th edition)

  • James, Christopher. "PARAMAGNETIC RESONANCE STUDIES OF HIGH-SPIN COBALT (II) COORDINATION COMPLEXES." Doctoral dissertation, Miami University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami152267342524459

    Chicago Manual of Style (17th edition)

miami152267342524459
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This open access ETD is published by Miami University and OhioLINK.