Topic
Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, a coordinating Schiff base bearing ligand was modified into a coordinating poly(styrene-divinylbenzene) which was subsequently complexed with palladium chloride and activated by using sodium borohydride.
Abstract: Chloromethylated poly(styrene-divinylbenzene) was modified into coordinating Schiff base bearing ligand which was subsequently complexed with palladium chloride and activated by using sodium borohydride. The polymer-supported palladium complex and activated catalyst were characterized by various techniques such as elemental analysis, X-ray photoelectron spectroscopy, atomic absorption spectroscopy, IR, far IR spectral studies, SEM and thermogravimetric analysis. Surface area measurements by BET method and swelling studies with different solvents for the catalyst were also carried out. Catalytic activity towards hydrogenation of 1-hexene, 1-heptene, 1-octene, cyclohexene, norbornadiene (nbd) and 1,5-cyclooctadiene (1,5-cod) was assessed. The influence of variation in temperature, pressure, concentration of the catalyst as well as the substrate and the nature of the solvent on the rate of the reaction was studied for a few olefins. Recycling ability of the catalyst was also evaluated.
35 citations
••
35 citations
••
TL;DR: In this paper, Cationic Pd(II)-complexes with weakly coordinating ligands were used for the olefin addition polymerization of strained polycyclic olefins.
Abstract: Cationic Pd(II) -complexes with weakly coordinating ligands were used for the olefin addition polymerization of strained polycyclic olefins. The cyclic structure of the monomers remained intact during the reaction which contrasts with products obtained from the olefin metathesis polymerization. The Pd(II) -catalyzed polymerizations showed the features of a “living” polymerization, when norbornene and selected exo-substituted norbornene derivatives were used as the monomers. Endo- and exo-dicyclopentadiene, exo-1,2-dihydrodicyclopentadiene, endo, exo-1,4,5,8-dimethano-1,2,3,4,4a,5,8,8a-octahydronaphthalene and endo, exo-1,4,5,8-dimethano-1,4,4,a,5,8,8a-hexahydronaphthalene were converted into the corresponding rigid polymers. The exo-substituted monomers were found to polymerize at a higher rate than the corresponding or similar endo-substituted monomers. The polymerization of norbornadiene and the subsequent thermal elimination of cyclopentadiene resulted in the formation of polyacetylene.
34 citations
••
TL;DR: A detailed investigation of the reactions of [RuX3(Eph3)2MeOH] with ligands containing nitrogen (alkyl and aryl cyanides, pyridine, 2,2′-bipyridyl, 1,10-phenanthroline), sulphur (dimethyl sulphoxide, dialkyl sulphides, carbon disulphide, sodium diphenylphosphinodithioate), oxygen (tetrahydrofuran, acetone, nitromethane) and carbon (norbornadiene,
Abstract: A detailed investigation of the reactions of [RuX3(Eph3)2MeOH](A)(X = Cl or Br; E = P or As) with ligands containing nitrogen (alkyl and aryl cyanides, pyridine, 2,2′-bipyridyl, 1,10-phenanthroline), sulphur (dimethyl sulphoxide, dialkyl sulphides, carbon disulphide, sodium diphenylphosphinodithioate), oxygen (tetrahydrofuran, acetone, nitromethane) and carbon (norbornadiene, 1,5-cyclo-octadiene, carbon monoxide) donor atoms is presented. Five different types of behaviour towards these ligands are exhibited by (A): (1) displacement of methanol giving the ruthenium(III) compounds [RuX3(Eph3)2L], e.g. L = RCN, Me2SO, CS2, CS; (2) displacement of methanol and one Eph3 group giving [RuX3(Eph3)L2], e.g. L2= Me2S, bipy, C5H5N; (3) complete displacement of methanol. Eph3 and X without reduction, e.g.[Ru(S2PPh2)3]; (4) reduction to ruthenium(II) with or without complete displacement of Eph3 groups, e.g.[RuX2L2(Eph3)2](L2= CO, C7H8,RCN) and [RuX2L4](L = C5H5N, Me2SO); (5) reduction to cationic ruthenium(II) compounds in methanol, e.g.[RuCl(PPh3)(N–N)2]Cl [(N–N)= bipy or phen]. Several of these compounds can also be synthesised from [RuX2(PPh3)3]. The compounds are characterised by elemental analyses, molecular weights, e.s.r., and magnetic measurements, and configurations tentatively suggested on the basis of detailed far-i.r. [ruthenium(III)] and 1H n.m.r. [ruthenium(II)] studies. Finally, electronic spectra (50 000–12 000 cm–1) are presented and discussed.
34 citations
••
TL;DR: La reaction du norbornadiene avec plusieurs derives de l'acetylene, silyles ou non, en presence d'un complexe Co(acac) 3, donne des derives de deltacyclene et de tricycloheptane as mentioned in this paper.
34 citations