Degree Name
MS (Master of Science)
Program
Chemistry
Date of Award
5-2016
Committee Chair or Co-Chairs
Scott Kirkby
Committee Members
Marina Roginskaya, David Close
Abstract
Heteroaryl nitrone spin traps have been suggested to act as free radical scavengers. The geometry optimizations and the single-point energies of the spin trapping reactions of the heteroaryl nitrones, 5,5-dimethylpyrroline-N-oxide (DMPO) and α-phenyl-N-t-butylnitrone (PBN) have been computationally studied using ab initio (Hartree-Fock (HF) and second-order Møller-Plesset (MP2)) methods and Density Functional Theory (DFT) methods. The effects of new heteroaryl substituents on a parent nitrone spin trap have been examined at the HF and MP2 levels with the 6-31G*, and cc-pVnZ (n=D, T, Q) basis sets. The thermodynamics of the spin trapping at the C-site and O-site with •H, •CH3 and •OH radicals were studied at the HF/6-31G* and DFT/m06/6-31G* levels. The addition reactions favor at the C-sites and the double adducts are thermodynamically more stable than the mono adducts. The spin trapping of DMPO, PBN and α(Z)-(3-methylfuroxan-4-yl)-N-tert-butylnitrone (FxBN) with •OH have also been studied.
Document Type
Thesis - unrestricted
Recommended Citation
Asempa, Eyram, "Computational Studies of Spin Trapping of Biologically Relevant Radicals by New Heteroaryl Nitrones" (2016). Electronic Theses and Dissertations. Paper 3029. https://dc.etsu.edu/etd/3029
Copyright
Copyright by the authors.