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13C 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

✍ Scribed by Andrew G. Carvill; Ruth M. E. Greene; James G. Hamilton; Kenneth J. Ivin; Alan M. Kenwrigth; John J. Rooney

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
489 KB
Volume
199
Category
Article
ISSN
1022-1352

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✦ Synopsis

13C NMR spectra of the three title polymers have been determined for polymers of different tacticities. Assignments to the various possible HWHT/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.

πŸ“œ SIMILAR VOLUMES

Metathesis polymerization of endo-5- and
Metathesis polymerization of endo-5- and exo-5-chloromethylbicyclo[2.2.1]hept-2-ene and of 5,5-bis(chloromethyl)bicyclo[2.2.1]hept-2-ene; microstructure of the polymers
✍ Kenneth J. Ivin; Luk-Mui Lam; John J. Rooney πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 494 KB

## Abstract The three title monomers were polymerized using a variety of Ru‐, Ir‐, Mo‐, W‐ and Re‐based metathesis catalyst systems to yield polymers having a wide range of __cis__ double bond contents in each case. The ^13^C NMR spectra of the polymers were interpreted in terms of __cis/trans__, h

Ring-opening metathesis polymerization o
Ring-opening metathesis polymerization of endo- and exo-5-methoxymethylbicyclo[2.2.1]hept-2-ene; microstructure of the polymers
✍ Kenneth J. Ivin; Luk-Mui Lam; John J. Rooney πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 361 KB

## Abstract The title monomers 1 and 2 were polymerized by Ru‐, Ir‐, Mo‐, W‐ and Re‐based metathesis catalysts to yield polymers with __cis__ contents ranging from 10% to at least 90% for 1 and 23–60% for 2. Assignments of the ^13^C NMR spectra were made. No significant head‐tail bias was observed