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13 C NMR spectra of hydrogenated polymers of exo ‐5‐methyl‐ endo ‐5‐methyl‐, and 5,5‐dimethyl‐derivatives of bicyclo[2.2.1]hept‐2‐ene prepared by ring‐opening metathesis polymerization
Author(s) -
Carvill Andrew G.,
Greene Ruth M. E.,
Hamilton James G.,
Ivin Kenneth J.,
Kenwrigth Alan M.,
Rooney John J.
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1998.021990424
Subject(s) - monomer , polymer , metathesis , chemistry , ene reaction , carbon 13 nmr , polymerization , polymer chemistry , bicyclic molecule , stereochemistry , organic chemistry
13 C NMR spectra of the three title polymers have been determined for polymers of different tacticities. Assignments to the various possible HH/HT/TT and m/r dyad structures were made. These were facilitated by the use of optically active monomers in the case of 1 and 3 . In the precursor polymers the cis double bonds in the HH dyads were less readily hydrogenated than those in the other types of dyad. Methyl substitution parameters are summarized for the hydrogenated polymers and their unsaturated trans precursors.