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Chromium allyl and alkyl catalysts for the vinyl polymerization of norbornene and ethylene–norbornene copolymerizations

✍ Scribed by Timothy J. Woodman; Yann Sarazin; Shaun Garratt; Gerhard Fink; Manfred Bochmann

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
325 KB
Volume
235
Category
Article
ISSN
1381-1169

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Oligomeric vinyl polynorbornene (2 to ∼12 monomer units) was obtained via hydrooligomerization of norbornene (NB) using the cationic palladium complexes [Pd(PPh 3 ) n (NCCH 3 ) 4-n ](BF 4 ) 2 [n = 0 (1), 3 (2)] at different hydrogen pressures. The vinyl polymerization of norbornene (NB) in the ionic

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## Abstract Summary: In non‐polar solvents such as toluene, Cp‐Ni and ‐Pd complexes (Cp = __η__^5^‐C~5~H~5~) with appropriate activators have been found to induce the addition polymerization of norbornene in excellent yields, for example (Cp)Pd(allyl)/[Ph~3~C][B(C~6~F~5~)~4~] gave 105 120 kg‐polyme