Ring-opening metathesis polymerization of 3-substituted cyclooctenes initiated by group 6 alkylidene complexes
Name
831410030-MIT.pdf
Description
Full printable version
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4.24 MB
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Checksum (MD5)
e2f772bc85554388235dc5fbc334838b
Author(s)
Kozera, Daniel James
Advisor(s)
Richard R. Schrock.
Date Issued
2012
Publisher
Massachusetts Institute of Technology
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.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references.
Subjects
Chemistry.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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