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NEUTRON DIFFRACTION STUDIES OF METAL HYDRIDE COMPLEXES
by
Kristen Aznavour
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(CHEMISTRY)
August 2008
Copyright 2008 Kristen Aznavour
Object Description
| Title | Neutron diffraction studies of metal hydride complexes |
| Author | Aznavour, Kristen |
| Author email | chingyec@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Chemistry |
| School | College of Letters, Arts and Sciences |
| Date defended/completed | 2008-06-09 |
| Date submitted | 2008 |
| Restricted until | Unrestricted |
| Date published | 2008-07-28 |
| Advisor (committee chair) | Bau, Robert |
| Advisor (committee member) |
Prakash, G. K. Surya McClure, William |
| Abstract | The single crystal X-ray diffraction technique is still the most prevalent method in structural determination; however, neutron diffraction can provide more detailed and accurate chemical information in areas (such as H positions) that X-ray diffraction is inadequate. Presented in this thesis are several single crystal neutron diffraction analyses on metal hydride complexes.; Chapter 1 gives a summary of "stretched" dihydrogen complexes studied by neutron diffraction thus far. In Chapter 2 , the first example of single crystal neutron study of Yb-H-B bridge bond is discussed, as found in the compound {K(MeTHF)3}2{Yb{(mu-H)2BC8H14}4}. In Chapter 3 we present the world s first example of a 5-coordinated trigonal bypiramidal hydrogen atom as well as a distorted 4-coordinated tetrahedral hydrogen atom. In the remaining chapters we shift our focus to the small iron/sulfur redox protein rebredoxin from pyrococcus furiosus: Chapter 4 discusses the results of nuclear resonance vibrational spectroscopy (NRVS) and extended X-ray absorption fine structure (EXAFS) on ^57Fe-enriched crystals of this protein. In Chapter 5, we describe the crystallization of two rubredoxin mutants, W3Y and F29G, that have different thermostability properties from those of the wild-type (natural) form of the protein. |
| Keyword | neutron diffraction; metal hydrides |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m1433 |
| Rights | Aznavour, Kristen |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-Aznavour-20080728 |
| Archival file | uscthesesreloadpub_Volume44/etd-Aznavour-20080728.pdf |
Description
| Title | Page 1 |
| Full text | NEUTRON DIFFRACTION STUDIES OF METAL HYDRIDE COMPLEXES by Kristen Aznavour A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (CHEMISTRY) August 2008 Copyright 2008 Kristen Aznavour |
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