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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 article, copolymers of norbornene with norbornadiene (NBD) were obtained via ROMP with [RuCl2(PPh3)2(L)] type complexes as initiators.
25 citations
TL;DR: In this paper, the crystal structures of the complexes [Rh{CPh(NPh)2}(cod)](1) and [Rh2{µ-CPhNPh2}2(tfbb)2](4) have been determined by X-ray diffraction methods.
Abstract: Complexes [{MCl(diolefin)}2](M = Rh or Ir) react with N,N′-diphenylbenzamidinate to yield binuclear [Rh2{µ-CPh(NPh)2}2(diolefin)2][diolefin = norbornadiene (nbd) or tetrafluorobarrelene (tfbb)] or mononuclear [M{CPh(NPh)2}(cod)](cod = cycle-octa-1,5-diene) complexes. The rhodium complexes react with carbon monoxide to give [Rh2{µ-CPh(NPh)2}2(CO)4]. The latter complex undergoes a two-centre oxidative addition with iodine yielding the rhodium(II) complex [Rh2{µ-CPh(NPh)2}2I2(CO)4]. An A-frame compound of formula [Rh2{µ-CPh(NPh)2}(µ-dppm)2(CO)] ClO4(dppm = Ph2PCH2PPh2) has been isolated. Some related mononuclear complexes containing a unidentate benzamidine ligand have also been prepared. The crystal structures of the complexes [Rh{CPh(NPh)2}(cod)](1) and [Rh2{µ-CPh(NPh)2}2(tfbb)2](4) have been determined by X-ray diffraction methods. Complex (1) crystallizes in the monoclinic space group P21/n, with a= 10.315(2), b= 19.507(3), c= 11.429(3)A, β= 103.62(1)°, and Z= 4. Crystals of compound (4) are monoclinic, space group P21/c, with Z= 4 and a unit cell of dimensions a= 21.692(2), b= 12.512(2), c= 19.969(2)A, and β= 107.90(1)°. Both structures were solved by Patterson and Fourier methods and refined by full-matrix least squares to R 0.040 and 0.047, respectively. The structure of (1) is mononuclear with the N,N′-diphenylbenzamidinate acting as a chelating ligand, through the nitrogen atoms. In contrast, complex (4) is binuclear with the benzamidinate ligand bridging two rhodium atoms [ Rh ⋯ Rh 2.982(3)A].
25 citations
TL;DR: In this paper, the influence of various solvents, ligands, Lewis acids and β-diketone ligands on yield and selectivity of the products were investigated.
25 citations
TL;DR: In this article, the bromofluorination of norbornadiene using NBS in the presence of the new fluorinating agent Et3N/3HF leads to a 3:2 mixture of 3-exo-bromo-5 exo-fluoronortricyclane 1 and 3exo bromo -5-endomaine-endomorphine-fluoronitriou-cyclane 2.
25 citations
TL;DR: In this article, it was tentatively proposed, 2,5-bistrifluoromethyl-3,4-diazabicyclo[4.3.0]nona-1,4,8-triene, plus 3,6-bifluorsm-s-tetrazine-pyridazine.
Abstract: Bistrifluoromethyl-s-tetrazine reacts with styrene to yield 4-phenyl-3,6-bistrifluoromethyl-1,4-dihydropyridazine, with cyclohexene to give 3,8-bistrifluoromethyl-1,3a,4,5,6,7-hexahydrophthalazine, with 2,3-dimethylbut-2-ene to yield 4,4,5,5-tetramethyl-3,6-bistrifluoromethyl-4,5-dihydropyridazine and with norbornadiene to give, it is tentatively proposed, 2,5-bistrifluoromethyl-3,4-diazabicyclo[4.3.0]nona-1,4,8-triene, plus 3,6-bistrifluoromethyl-pyridazine. The last compound is formed by reaction of the tetrazine with acetylene, and 4-methyl- and 4,5-bistrimethylstannyl-3,6-bistrifluoromethyl-pyridazines are formed by reaction with propyne and with bistrimethylstannylacetylene, respectively.Reaction of the tin compound with iodine and with chlorine yields 4,5-di-iodo- and -dichloro-3,6-bistrifluoro-methylpyridazine, respectively, and the latter compound yields perfluoro-3,6-dimethylpyridazine with potassium fluoride.Perfluoro-3,6-dimethylpyridazine rearranges photochemically in the vapour phase into perfluoro-2,5-dimethylpyrazine.
25 citations