Highly  trans ‐1,4‐specific polymerization of 1,3‐butadiene catalyzed by [2,6‐bis{(4 S )‐ (−)‐isopropyl‐2‐oxazolin‐2‐yl}pyridine] chromium complex activated with modified methylaluminoxane | Zendy

Nakayama Yuushou | Zendy; Sogo Kenji | Zendy; Cai Zhengguo | Zendy; Yasuda Hajime | Zendy; Shiono Takeshi | Zendy

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Highly trans ‐1,4‐specific polymerization of 1,3‐butadiene catalyzed by [2,6‐bis{(4 S )‐ (−)‐isopropyl‐2‐oxazolin‐2‐yl}pyridine] chromium complex activated with modified methylaluminoxane

Author(s) -

Nakayama Yuushou,

Sogo Kenji,

Cai Zhengguo,

Yasuda Hajime,

Shiono Takeshi

Publication year - 2011

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.3008

Subject(s) - methylaluminoxane , isopropyl , polymerization , terpyridine , isoprene , pyridine , chromium , 1,3 butadiene , polymer chemistry , catalysis , chemistry , medicinal chemistry , copolymer , polymer , organic chemistry , metallocene , metal

Chromium complexes with N , N , N ‐tridentate ligands, LCrCl 3 (L = 2,6‐bis{(4S)‐(−)‐isopropyl‐2‐oxazolin‐2‐yl}pyridine ( 1 ), 2,2′:6′,2″‐terpyridine ( 2 ), and 4,4′,4″‐tri‐ tert ‐butyl‐2,2′:6′,2″‐terpyridine ( 3 )), were prepared. The structures of 1 and 2 were determined by X‐ray crystallography. Upon activation with modified methylaluminoxane (MMAO), 1 catalyzed the polymerization of 1,3‐butadiene, while 2 and 3 was inactive. The obtained poly(1,3‐butadiene) obtained with 1 ‐MMAO was found to have completely trans ‐1,4 structure. The 1 ‐MMAO system also showed catalytic activity for the polymerization of isoprene to give polyisoprene with trans ‐1,4 (68%) and cis ‐1,4 (32%) structure. Copyright © 2011 Society of Chemical Industry

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