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A study of proton-proton coupling constants in cis,cis -1,4-dialkyl-1,3-butadienes

✍ Scribed by Bacon, Mark; Maciel, Gary E.

Book ID: 127369366
Publisher: Taylor and Francis Group
Year: 1971
Tongue: English
Weight: 733 KB
Volume: 21
Category: Article
ISSN: 0026-8976
DOI: 10.1080/00268977100101401

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## Abstract Novel complexes [(C~5~Me~5~)~2~Ln][B(C~6~F~5~)~4~] (Ln = Pr, Nd, or Gd) were prepared, which in combination with ^__i__^Bu~3~Al efficiently induce highly 1,4‐cis‐specific polymerization of butadiene. The activity of the Gd complex/^__i__^Bu~3~Al system is high enough to exhibit good cat