{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc2807"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc2807","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"An NMR study of 2-ethyl-1-butyllithium and of 2-ethyl-1-butyllithium/lithium 2-ethyl-1-butoxide mixed aggregates","abstract":"A 1H, 13C, and 6Li NMR study of 2-ethyl-1-butyllithium indicated that 2-ethyl-1-butyllithium exists only as a hexameric aggregate over the entire temperature range of 25 to - 92.1 ° C in cyclopentane. Reacting 2-ethyl-1-butyllithium with 2-ethyl-1-butanol resulted in alkyllithium/lithium alkoxide mixed aggregates, apparently of the form Ra(RO)bLia+b. A multinuclear, variable temperature NMR study of samples with O:Li ratios of 0.2 and 0.4 showed, in addition to the alkyllithium, the formation of four mixed aggregates, one of them probably an octamer. Higher O:Li ratio samples showed the formation of several other mixed aggregates. Mixing 2-ethyl-1-butyllithium with independently prepared lithium 2-ethyl-1-butoxide formed the same mixed aggregates formed by in situ synthesis of lithium alkoxide. Lithium 2-ethyl-1-butoxide also exists as aggregates in cyclopentane.","abstract_html":"A 1H, 13C, and 6Li NMR study of 2-ethyl-1-butyllithium indicated that 2-ethyl-1-butyllithium exists only as a hexameric aggregate over the entire temperature range of 25 to - 92.1 ° C in cyclopentane. Reacting 2-ethyl-1-butyllithium with 2-ethyl-1-butanol resulted in alkyllithium/lithium alkoxide mixed aggregates, apparently of the form Ra(RO)bLia+b. A multinuclear, variable temperature NMR study of samples with O:Li ratios of 0.2 and 0.4 showed, in addition to the alkyllithium, the formation of four mixed aggregates, one of them probably an octamer. Higher O:Li ratio samples showed the formation of several other mixed aggregates. Mixing 2-ethyl-1-butyllithium with independently prepared lithium 2-ethyl-1-butoxide formed the same mixed aggregates formed by in situ synthesis of lithium alkoxide. Lithium 2-ethyl-1-butoxide also exists as aggregates in cyclopentane.","abstract_has_math":false,"creators":["Ferreira, Aluisio V. C."],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Thomas, Ruthanne D.","Desiderato, Robert"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001-05","date_published":"2001-05","updated_at":"2026-07-24T05:34:52Z","subjects":["Organolithium compounds.","Nuclear magnetic resonance spectroscopy.","alkyllithium","lithium","alkoxide","mixed aggregates","NMR"],"languages":["English"],"rights":["Public","Copyright","Ferreira, Aluisio V. C.","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 47833666","https://digital.library.unt.edu/ark:/67531/metadc2807/","ark: ark:/67531/metadc2807"],"render_values":[{"text":"oclc: 47833666","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc2807/","href":"https://digital.library.unt.edu/ark:/67531/metadc2807/","code":true},{"text":"ark: ark:/67531/metadc2807","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc2807","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Thomas, Ruthanne D.","Desiderato, Robert"]},{"key":"dc:creator","label":"Author","values":["Ferreira, Aluisio V. 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Higher O:Li ratio samples showed the formation of several other mixed aggregates. Mixing 2-ethyl-1-butyllithium with independently prepared lithium 2-ethyl-1-butoxide formed the same mixed aggregates formed by in situ synthesis of lithium alkoxide. Lithium 2-ethyl-1-butoxide also exists as aggregates in cyclopentane."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["An NMR study of 2-ethyl-1-butyllithium and of 2-ethyl-1-butyllithium/lithium 2-ethyl-1-butoxide mixed aggregates"]}]}],"canonical_facts":{"dc:contributor":["Thomas, Ruthanne D.","Desiderato, Robert"],"dc:creator":["Ferreira, Aluisio V. C."],"dc:date":["2001-05"],"dc:description":["A 1H, 13C, and 6Li NMR study of 2-ethyl-1-butyllithium indicated that 2-ethyl-1-butyllithium exists only as a hexameric aggregate over the entire temperature range of 25 to - 92.1 ° C in cyclopentane. Reacting 2-ethyl-1-butyllithium with 2-ethyl-1-butanol resulted in alkyllithium/lithium alkoxide mixed aggregates, apparently of the form Ra(RO)bLia+b. A multinuclear, variable temperature NMR study of samples with O:Li ratios of 0.2 and 0.4 showed, in addition to the alkyllithium, the formation of four mixed aggregates, one of them probably an octamer. Higher O:Li ratio samples showed the formation of several other mixed aggregates. Mixing 2-ethyl-1-butyllithium with independently prepared lithium 2-ethyl-1-butoxide formed the same mixed aggregates formed by in situ synthesis of lithium alkoxide. Lithium 2-ethyl-1-butoxide also exists as aggregates in cyclopentane."],"dc:format":["Text"],"dc:identifier":["oclc: 47833666","doi: 10.12794/metadc2807","https://digital.library.unt.edu/ark:/67531/metadc2807/","ark: ark:/67531/metadc2807"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Ferreira, Aluisio V. C.","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["Organolithium compounds.","Nuclear magnetic resonance spectroscopy.","alkyllithium","lithium","alkoxide","mixed aggregates","NMR"],"dc:title":["An NMR study of 2-ethyl-1-butyllithium and of 2-ethyl-1-butyllithium/lithium 2-ethyl-1-butoxide mixed aggregates"],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:34:52Z"}