{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/78531"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/78531","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes","abstract":"The highly cis,head-to-tail (cis,HT) selective ring-opening metathesis polymerization of 3-substituted cyclooctenes (3-RCOE; R = methyl, hexyl, phenyl) initiated by high oxidation state M and W alkylidene complexes is described herein. W(NtBu)(CHCMe₃)(pyr)(OHMT) combined high cis,HT selectivity (>98% cis,HT) with high activity, achieving 76% conversion of 5000 equivalents of 3-HexCOE after 24 h at room temperature. The resulting cis,HT-poly(3-RCOE)s (R = Me, Hex) were isolated, characterized by ¹H and ¹³C NMR, size-exclusion chromatography, and differential scanning calorimetry, and hydrogenated to generate the corresponding saturated polymer.","abstract_html":"The highly cis,head-to-tail (cis,HT) selective ring-opening metathesis polymerization of 3-substituted cyclooctenes (3-RCOE; R = methyl, hexyl, phenyl) initiated by high oxidation state M and W alkylidene complexes is described herein. W(NtBu)(CHCMe₃)(pyr)(OHMT) combined high cis,HT selectivity (>98% cis,HT) with high activity, achieving 76% conversion of 5000 equivalents of 3-HexCOE after 24 h at room temperature. The resulting cis,HT-poly(3-RCOE)s (R = Me, Hex) were isolated, characterized by ¹H and ¹³C NMR, size-exclusion chromatography, and differential scanning calorimetry, and hydrogenated to generate the corresponding saturated polymer.","abstract_has_math":false,"creators":["Kozera, Daniel James"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Chemistry.","school":null,"contributors":[],"advisors":["Richard R. Schrock."],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012","date_published":"2012","updated_at":"2026-07-22T22:20:56Z","subjects":["Chemistry."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/78531","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Richard R. Schrock."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Department of Chemistry."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Department of Chemistry."]},{"key":"dc:creator","label":"Author","values":["Kozera, Daniel James"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2013-04-12T19:36:45Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2013-04-12T19:36:45Z"]},{"key":"dc:date.issued","label":"Date","values":["2012"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/78531"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2012.","Cataloged from PDF version of thesis.","Includes bibliographical references."]},{"key":"dc:description.abstract","label":"Abstract","values":["The highly cis,head-to-tail (cis,HT) selective ring-opening metathesis polymerization of 3-substituted cyclooctenes (3-RCOE; R = methyl, hexyl, phenyl) initiated by high oxidation state M and W alkylidene complexes is described herein. W(NtBu)(CHCMe₃)(pyr)(OHMT) combined high cis,HT selectivity (>98% cis,HT) with high activity, achieving 76% conversion of 5000 equivalents of 3-HexCOE after 24 h at room temperature. The resulting cis,HT-poly(3-RCOE)s (R = Me, Hex) were isolated, characterized by ¹H and ¹³C NMR, size-exclusion chromatography, and differential scanning calorimetry, and hydrogenated to generate the corresponding saturated polymer."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes"]}]}],"canonical_facts":{"dc:contributor.advisor":["Richard R. Schrock."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Chemistry."],"dc:contributor.other":["Massachusetts Institute of Technology. Department of Chemistry."],"dc:creator":["Kozera, Daniel James"],"dc:date.accessioned":["2013-04-12T19:36:45Z"],"dc:date.available":["2013-04-12T19:36:45Z"],"dc:date.issued":["2012"],"dc:description":["Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2012.","Cataloged from PDF version of thesis.","Includes bibliographical references."],"dc:description.abstract":["The highly cis,head-to-tail (cis,HT) selective ring-opening metathesis polymerization of 3-substituted cyclooctenes (3-RCOE; R = methyl, hexyl, phenyl) initiated by high oxidation state M and W alkylidene complexes is described herein. W(NtBu)(CHCMe₃)(pyr)(OHMT) combined high cis,HT selectivity (>98% cis,HT) with high activity, achieving 76% conversion of 5000 equivalents of 3-HexCOE after 24 h at room temperature. The resulting cis,HT-poly(3-RCOE)s (R = Me, Hex) were isolated, characterized by ¹H and ¹³C NMR, size-exclusion chromatography, and differential scanning calorimetry, and hydrogenated to generate the corresponding saturated polymer."],"dc:description.degree":["S.M."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/78531"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Chemistry."],"dc:title":["Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:20:56Z"}