{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/44898"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/44898","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Chiral molybdenum and tungsten imido alkylidene complexes as catalysts for asymmetric ring-closing metathesis (ARCM)","abstract":"Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetric ring-closing metathesis (ARCM) is described. -- Chapter 5. Synthesis, characterization and reactivity of (±)(Me2)W(Neo) and (±)(iPr 2)W(Neo) . PMe2Ph is discussed.","abstract_html":"Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetric ring-closing metathesis (ARCM) is described. -- Chapter 5. Synthesis, characterization and reactivity of (±)(Me2)W(Neo) and (±)(iPr 2)W(Neo) . PMe2Ph is discussed.","abstract_has_math":false,"creators":["Alexander, John Bryson, 1972-"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Chemistry.","school":null,"contributors":[],"advisors":["Richard R. Schrock."],"committee_chairs":[],"committee_members":[],"year":1999,"date_issued":"1999","date_published":"1999","updated_at":"2026-07-22T22:22:14Z","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/1721.1/44898","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. 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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/1721.1/44898"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.","Includes bibliographical references (leaves 172-179)."]},{"key":"dc:description.abstract","label":"Abstract","values":["Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetric ring-closing metathesis (ARCM) is described. -- Chapter 5. Synthesis, characterization and reactivity of (±)(Me2)W(Neo) and (±)(iPr 2)W(Neo) . PMe2Ph is discussed."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph.D."]},{"key":"dc:title","label":"Title","values":["Chiral molybdenum and tungsten imido alkylidene complexes as catalysts for asymmetric ring-closing metathesis (ARCM)"]}]}],"canonical_facts":{"dc:contributor.advisor":["Richard R. Schrock."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Chemistry."],"dc:contributor.other":["Massachusetts Institute of Technology. Dept. of Chemistry."],"dc:creator":["Alexander, John Bryson, 1972-"],"dc:date.accessioned":["2009-03-16T19:57:26Z"],"dc:date.available":["2009-03-16T19:57:26Z"],"dc:date.issued":["1999"],"dc:description":["Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.","Includes bibliographical references (leaves 172-179)."],"dc:description.abstract":["Chapter 1. The synthesis and resolution of sterically encumbered biphenols is presented. -- Chapter 2. The synthesis of molybdenum(VI) imido alkylidene complexes containing racemic and optically pure biphenoxides (Biphen and Biad) is reported. -- Chapter 3. The 1H NMR spectroscopic data for molybdenum(VI) imido alkylidene biphenoxide complexes prepared in Chapter 2 are presented. -- Chapter 4. The application of catalysts prepared in Chapter 2 in asymmetric ring-closing metathesis (ARCM) is described. -- Chapter 5. Synthesis, characterization and reactivity of (±)(Me2)W(Neo) and (±)(iPr 2)W(Neo) . PMe2Ph is discussed."],"dc:description.degree":["Ph.D."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/44898"],"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":["Chiral molybdenum and tungsten imido alkylidene complexes as catalysts for asymmetric ring-closing metathesis (ARCM)"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:22:14Z"}