2026-09-18T18:39:59Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/785312022-01-13T07:53:58Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Richard R. Schrock.
Kozera, Daniel James
Massachusetts Institute of Technology. Department of Chemistry.
Massachusetts Institute of Technology. Department of Chemistry
2013-04-12T19:36:45Z
2013-04-12T19:36:45Z
2012
2012
http://hdl.handle.net/1721.1/78531
831410030
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references.
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.
by Daniel James Kozera.
S.M.
36 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
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http://dspace.mit.edu/handle/1721.1/7582
Chemistry.
Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes
Thesis
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Publication
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<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>
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