Article PDF
References
I. Cho, Makromol. Chem. Macromol. Symp., 33, 45 (1990).
A. J. Amass, “New Methods of Polymer Synthesis,” J. R. Ebdon, Ed., Chapman and Hall, New York, N.Y., 1991, p 76.
51.4 ml of n-butyllithium (0.13 mol, 2.5 M in hexane) was added dropwise to diisopropylamine (13.0 g, 0.13 mol) in 50 ml of anhydrous THF at −78°C. After the addition was completed, the reaction mixture was allowed to come to room temperature and stirred there for 30 min. The solution was recooled to −78°C, followed by the dropwise addition of 50 ml anhydrous THF solution of PCON (25 g, 0.13 mol) and stirred for 2 h. The resulting enolate solution was added dropwise with cannular to 500 ml ammonina solution of diphenyliodonium chloride (44.3g, 0.14 mol). After standing for 4 h, ammonia was allowed to evaporate and the resulting solution was extracted with ether. The solid obtained by evaporation of the solvent was recrystallized from ether-hexane as white crystal: 15.2 g, 55 mmol (yield 44.1%); mp 147°C; 300 MHz 1H NMR (CDCl3) δ=7.30–7.23 (m, 5H), δ=7.05–7.01 (m, 3H), δ=6.66–6.63 (m, 2H), δ=5.89–5.83 (m, 2H), δ=3.95–3.90 (dd, 1H), δ=3.88–3.82 (dd, 1H), δ=3.38–3.26 (m, 1H), δ=2.52–2.41 (m, 2H), δ=2.28–2.21 (m, 1H), δ=2.07–1.94 (m, 1H), δ=1.76–1.68 (m, 1H). 13C NMR: δ=211.1, 141.2, 135.4, 131.4, 129.2, 128.6, 128.0, 127.8, 127.7, 127.6, 126.3, 61.9, 52.6, 33.6, 26.5, 25.5.
G. L. Olson, M. E. Voss, D. E. Hill, M. Kahn, V. S. Madison, and C. M. Cook, J. Am. Chem. Soc., 112, 323 (1990).
F. Quignard, M. Leconte, and J. M. Basset, J. Mol. Catal., 36, 13 (1986).
Polymerization procedure by the catalyst systems was proceeded as follows; The weighed WCl4(OAr)2 was dissolved in toluene to be 0.05 N solution. The corresponding amount of cocatalyst was added at 80°C and the resulting solution was aged for 5 min at that temperature. Then the catalyst solution was added to the degassed monomer.
L. A. Wood, J. Polym. Sci., 28, 319 (1958).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cho, I., Hwang, K. Ring-Opening Metathesis Polymerization of 4,6-Diphenylcyclooctene: 2:1 Alternating Copolymer of Styrene and Butadiene. Polym J 25, 111–113 (1993). https://doi.org/10.1295/polymj.25.111
Issue Date:
DOI: https://doi.org/10.1295/polymj.25.111