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Living coordination polymerization of allene (1,2‐propadiene) by π‐allylnickel catalyst and selective hydrosilylation reaction of polymers having polyallene units
Author(s) -
Taguchi Masanori,
Tomita Ikuyoshi,
Endo Takeshi
Publication year - 2000
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 - 10.1002/1521-3935(20001101)201:17<2322::aid-macp2322>3.0.co;2-q
Subject(s) - hydrosilylation , allene , polymer chemistry , polymerization , copolymer , chemistry , catalysis , polymer , yield (engineering) , cationic polymerization , living polymerization , radical polymerization , materials science , organic chemistry , metallurgy
The coordination polymerization of allene (1,2‐propadiene, 2A ) was carried out by [( η 3 ‐allyl)NiOCOCF 3 ] 2 ( 1 ) to obtain narrowly dispersed poly( 2A ) in high yield. The linear relationship between the ratio of 2A/1 and the molecular weight of the polymer supported the living character of the polymerization. The block copolymer of 2A with 1‐phenylethyl isonitrile ( 2B ) was obtained in a two‐stage process, the polymerization of 2A followed by that of 2B . Hydrosilylation of poly( 2A ) or poly( 2A )‐ block ‐poly( 2B ) with silicon hydrides ( 3A and 3B ) in the presence of H 2 PtCl 6 catalyst successfully incorporated the silyl groups into the polyallene segments.