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Ring-opening metathesis polymerization of endo- and exo-5-methoxymethylbicyclo[2.2.1]hept-2-ene; microstructure of the polymers

✍ Scribed by Kenneth J. Ivin; Luk-Mui Lam; John J. Rooney

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
361 KB
Volume
195
Category
Article
ISSN
1022-1352

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✦ Synopsis

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 in either polymer. A high‐trans polymer made from the optically active endo monomer ((βˆ’)‐1) was atactic, while high‐cis polymers could be either atactic or biased towards syndiotactic, depending on the catalyst.

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

13C NMR spectra of hydrogenated polymers
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
✍ Andrew G. Carvill; Ruth M. E. Greene; James G. Hamilton; Kenneth J. Ivin; Alan M πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 489 KB

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