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Polymerization of ortho ‐Substituted Phenylacetylenes with Well‐Defined Ruthenium‐Alkylidene Catalysts and Related Metathesis Initiators
Author(s) -
Katsumata Toru,
Shiotsuki Masashi,
Sanda Fumio,
Sauvage Xavier,
Delaude Lionel,
Masuda Toshio
Publication year - 2009
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.200900245
Subject(s) - ruthenium , alkoxy group , polymer chemistry , metathesis , polymerization , polymer , chemistry , acyclic diene metathesis , catalysis , silylation , ring opening metathesis polymerisation , acetylene , organic chemistry , alkyl
Abstract The polymerization of (2‐isopropoxyphenyl)acetylene was investigated using a wide range of well‐defined ruthenium‐alkylidene complexes and related olefin metathesis initiators. In view of its superior activity, the second generation Hoveyda–Grubbs catalyst was singled out for further studies. Only phenylacetylenes ortho ‐substituted with alkoxy, ester, fluoro, and silyl groups afforded polymers with moderate molecular weights. They were characterized by various analytical techniques, and their properties were compared with those of samples prepared using Rh and W initiators. The Ru‐based polymers possessed high trans contents and took a helical conformation with predominantly one‐handed screw sense when chiral side‐chains were present.