Topic
Norbornene
About: Norbornene is a research topic. Over the lifetime, 5628 publications have been published within this topic receiving 104495 citations. The topic is also known as: norbornylene & norcamphene.
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TL;DR: In this paper, an in situ generated cationic allylpalladium complex bearing N-heterocy-clic carbene (NHC) ligands, derived from the reaction of ((g 3 -C3H5)Pd(nHC)Cl) with AgX (X ¼ BF4 or SbF6), is an active catalyst for the addition polymerization of norbor- nene and norbornene derivatives (5-norbornene-2-carboxylic acid methyl ester (b )a nd 5
Abstract: An in situ generated cationic allylpalladium complex bearing N-heterocy- clic carbene (NHC) ligands, derived from the reaction of ((g 3 -C3H5)Pd(NHC)Cl) with AgX (X ¼ BF4 or SbF6), is an active catalyst for the addition polymerization of norbor- nene and norbornene derivatives (5-norbornene-2-carboxylic acid methyl ester (b )a nd 5-norbornene-2-carboxylic acid n-butyl ester (c)) with an ester group containing a large portion of endo-isomers. The catalytic activities, polymer yields, molecular weights, and molecular weight distributions of polynorbornenes were investigated under various reaction conditions: the catalytic activity was highly dependent on the counteranion, the reaction solvent, and the reaction temperature. For b, as the portion of an endo-iso- mer increased, the activity of 13(SbF � ) was much higher than those of 14 and 15 ,a nd for c (exo/endo ¼ 95:5), the maximum turn over number (TON) was observed with 15(SbF � ). V C 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 3042-3052, 2007
49 citations
49 citations
TL;DR: The ruthenium(II)-catalyzed reaction of a substituted 1,6-heptadiyne with norbornene gave a tandem cycloaddition product as a single stereoisomer along with a [2 + 2 + + 2] cycloadduct as discussed by the authors.
49 citations
TL;DR: An efficient Pd-catalyzed oxidative cyclization reaction for the synthesis of functionalized indolines by direct C-H activation of acetanilide has been developed and the norbornylpalladium species is supposed to be a key intermediate in this transformation.
48 citations
TL;DR: In this paper, the synthesis of exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide and its ring-opening metathesis copolymerization with norbornene was reported.
Abstract: This work reports the synthesis of exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide and its ring-opening metathesis copolymerization with norbornene to yield poly(exo-N-phenyl-7-oxanorbornene-5,6-dicarboximide-co-norbornene), with molar ratio 50/50. The glass transition temperature of the copolymer is 125 °C. Permeation and sorption processes of different gases (hydrogen, nitrogen, oxygen, carbon monoxide, carbon dioxide, methane, ethylene, and ethane) were measured in membranes prepared by casting from solutions of the copolymer in chloroform. The Langmuir capacity of the gases is relatively small due to the nearness of the glass transition temperature of the polymer to the working temperature. The solution of the most condensable gases in the continuous phase of the membrane is apparently described by the Flory−Huggins theory of polymer−diluent mixtures. In general, the membranes exhibit a reasonably high separation coefficient of hydrogen with respect to ethane, ethylene, nitrogen, and methane. The value...
48 citations