{"id":{"repo_id":"uab","oai_identifier":"oai:digitalcommons.library.uab.edu:etd-collection-8042"},"canonical_url":"https://search.dev.ndltd.org/etd/uab/oai:digitalcommons.library.uab.edu:etd-collection-8042","repository":{"repo_id":"uab","name":"University of Alabama Birmingham","base_url":"https://digitalcommons.library.uab.edu/do/oai/"},"display":{"title":"NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents.","abstract":"Proton nmr linebroadening studies of dimethylsulfoxide (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic parameters for the first and second coordination sphere processes are ΔΗ≠0 = 24 kcal/mol, k1 = 24 sec-1 and ΔΗ≠= 8.8 kcal/mol, and k1 = 2.1 x 103 sec-1 A discussion is given of the possibility of electron transfer through second coordination sphere bonding.","abstract_html":"Proton nmr linebroadening studies of dimethylsulfoxide (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic parameters for the first and second coordination sphere processes are ΔΗ≠0 = 24 kcal/mol, k1 = 24 sec-1 and ΔΗ≠= 8.8 kcal/mol, and k1 = 2.1 x 103 sec-1 A discussion is given of the possibility of electron transfer through second coordination sphere bonding.","abstract_has_math":false,"creators":["Harris, Marvin Eugene, Jr"],"institution":null,"degree_name":null,"degree_level":"Thesis","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1977,"date_issued":"1977-01-01T08:00:00Z","date_published":"1977-01-01T08:00:00Z","updated_at":"2026-07-24T05:05:40Z","subjects":["Linebroadening","Dimethylsulfoxide","DMSO solutions","Kinetic parameters"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://digitalcommons.library.uab.edu/etd-collection/7050","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Harris, Marvin Eugene, Jr"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Linebroadening","Dimethylsulfoxide","DMSO solutions","Kinetic parameters"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://digitalcommons.library.uab.edu/etd-collection/7050"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Proton nmr linebroadening studies of dimethylsulfoxide (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic parameters for the first and second coordination sphere processes are ΔΗ≠0 = 24 kcal/mol, k1 = 24 sec-1 and ΔΗ≠= 8.8 kcal/mol, and k1 = 2.1 x 103 sec-1 A discussion is given of the possibility of electron transfer through second coordination sphere bonding."]},{"key":"dc:title","label":"Title","values":["NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents."]}]}],"canonical_facts":{"dc:creator":["Harris, Marvin Eugene, Jr"],"dc:description.abstract":["Proton nmr linebroadening studies of dimethylsulfoxide (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a second - coordination sphere exchange process. Above 70°C, the dominant process was a mixture of first coordination sphere exchange process of partially +3 dissociated Cr(en) 3+3 and second coordination sphere T2m-1 relaxation. The kinetic parameters for the first and second coordination sphere processes are ΔΗ≠0 = 24 kcal/mol, k1 = 24 sec-1 and ΔΗ≠= 8.8 kcal/mol, and k1 = 2.1 x 103 sec-1 A discussion is given of the possibility of electron transfer through second coordination sphere bonding."],"dc:identifier":["https://digitalcommons.library.uab.edu/etd-collection/7050"],"dc:subject":["Linebroadening","Dimethylsulfoxide","DMSO solutions","Kinetic parameters"],"dc:title":["NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents."],"thesis:degree_level":["Thesis"]},"updated_at":"2026-07-24T05:05:40Z"}