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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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TL;DR: In this paper, the exo-exo and endo-endo norbornadiene dimers were synthesized and homopolymerized using the Re(CO)5Cl/EtAlCl2 catalyst system.
Abstract: The exo-exo and endo-endo norbornadiene dimers were synthesized and homopolymerized using the Re(CO)5Cl/EtAlCl2 catalyst system. The exo-exo dimer was copolymerized with norbornene, both as a random polymer and as a diblock. In all cases, the polymers obtained were mainly of the ring-retained, rather than ring-opened type, even though Re(CO)5Cl/EtAlCl2 is an olefin metathesis catalyst and the monomers are strained ring systems.
8 citations
TL;DR: Ring-opening metathesis polymerization (ROMP) of norbornadiene (NBD) with [RuCl2(PPh3)2(pyrrolidine)] as the starting complex was evaluated as a function of reaction time, solvent volume, and atmosphere type at 25°C.
Abstract: Ring-opening metathesis polymerization (ROMP) of norbornadiene (NBD) with [RuCl2(PPh3)2(pyrrolidine)] as the starting complex was evaluated as a function of reaction time, solvent volume, and atmosphere type at 25 °C. Quantitative yields of polyNBD were obtained either under inert argon atmosphere or in air, with 2 mL of CHCl3, for 30 min. Copolymerization of NBD with norbornene (NBE) resulted in 100–70% yield under argon, depending on the NBE/NBD molar ratio, and in 70% yield in air, with 2 mL, for 120 min. TGA, DSC, and DMA measurements and swelling tests supported the occurrence of cross-linking in homopolyNBD and in the copolymers isolated from polymers. SEM micrographs showed porous polymeric NBD materials with pores that decreased in size when increasing the amount of NBD in the starting reaction composition. Results from amine parent complexes when the amine was piperidine or perhydroazepine are also discussed, with high cross-linking degree from reaction with the pyrrolidine complex.
8 citations
TL;DR: In this article, 3-Vinylisoxazole is prepared by a sequence involving cycloaddition of acrylonitrile oxide, generated by dehydration of 1-nitropropene, to norbornadiene followed by Diels-Alder cycloreversion of the resulting 2-isoxoxazoline under flash vacuum pyrolysis conditions.
Abstract: 3-Vinylisoxazole is prepared by a sequence involving cycloaddition of acrylonitrile oxide, generated by dehydration of 1-nitropropene, to norbornadiene followed by Diels–Alder cycloreversion of the resulting 2-isoxazoline under flash vacuum pyrolysis conditions
8 citations
TL;DR: In this paper, the addition of dimethyl phosphonate to norbornadiene was found to give four main compounds 2, 3, 4, and 5 whose structures have been demonstrated by chemical and spectroscopical methods.
Abstract: Radical addition of dimethyl phosphonate to norbornadiene was found to give four main compounds 2, 3, 4, and 5 whose structures have been demonstrated by chemical and spectroscopical methods. Particularly noteworthy is the formation of norbornene phosphonate derivatives in addition to the nortricyclene derivatives.
8 citations