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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, the synthesis and structure of an anhydride with an additional five-membered dithiole ring was investigated, and the 1.62 A separation indicates this molecule is a candidate for the shortest H· ···H interaction.
Abstract: A short H· · ·H intramolecular interaction was reported previously for an anhydride of syn-sesquinorbornene. The synthesis and structure of a such an anhydride with an additional five-membered dithiole ring has been investigated. While hydrogen atom positions are not accurately located, the 1.62 A separation indicates this molecule is a candidate for the shortest H· · ·H interaction. Two cycloadducts of norbornadiene, which literature suggests might exhibit additional short interactions, are reported also; however, the isomers with minimal intramolecular interactions are the isolated products. C22H20O3S2, 3, crystallizes in P
$$\bar 1$$
with a = 10.881(4), b = 13.712(8), C = 6.548(8) A, α = 101.32(6), β = 107.49(5), γ = 90.49(4)°, D
calc = 1.445 g cm−3, and Z = 2, C21H20O4Cl8, 5, in P21/n with a = 8.168(2), b = 13.488(4), c = 23.500(6) A, β = 94.72(2)°, D
calc = 1.597 g cm−3, and Z = 4, C21H28O4, 6, in P>
$$\bar 1$$
with a = 12.667(2), b = 12.792(2), c = 12.540(2) A, α = 113.51(1), β = 98.18(1), α = 74.39(1)°, D
calc = 1.276 g cm−3, and Z = 4.
8 citations
TL;DR: The edge-shared bioctahedral cluster (PPN) as mentioned in this paper was formed by the substitution of carbonyl ligands by two types of π-bonding ligands, viz., a diene and an alkyne.
8 citations
TL;DR: The X-ray crystal structure analysis of the title compound, exo,exo-2,3-endo,endo-5,6-tetrabromobicycloheptane, C7H8Br4, showed that the skeleton of the molecule is not changed after two bromine molecules are added via successive bromination reactions.
Abstract: The X-ray crystal structure analysis of the title compound, exo,exo-2,3-endo,endo-5,6-tetrabromobicycloheptane, C7H8Br4, which is a product of high temperature bromination of norbornadiene, shows that the skeleton of the molecule is not changed after two bromine molecules are added via successive bromination reactions. The addition of Br2 to both double bonds occurs (contrary to our expectation) in a syn fashion. It crystallizes in the orthorhombic space group Pbca with a = 15.688(2), b = 13.345(2), c = 9.461(1) A, V = 1980.7(3) A3, Z = 8 and Dx = 2.762 gcm−3.
8 citations
Patent•
26 Feb 1988TL;DR: In this paper, two polyoxoanion supported metal complexes are shown to be useful in olefin hydrogenation in organic solvents, which are called Ax[LnIr(1).X2M15M'3o62]x-and Ay[Llir(1), X2M9M' 3o40]y-, where A is a countercation; L is an ole fin-oxygen ligand or dioxygen; n = 1 or 2; X is a hetero atom selected from the group consisting of
Abstract: The present invention discloses two polyoxoanion supported metal complexes found to be useful in olefin hydrogenation. The complexes are novel compositions of matter which are soluble in organic solvents. In particular, the compositions of matter comprise Ax[LnIr(1).X2M15M'3o62]x- and Ay[LnIr(1).X2M9M'3o40]y-, where A is a countercation; L is an olefinic ligand or dioxygen; n = 1 or 2; X is a hetero atom selected from the group consisting of B, Si, Ge, P, As, Se, Te, I, Co, Mn and Cu; M = W or Mo; M' = Nb, V, Ti, Zr, Ta and Hf; x < 15; and y < 15.
8 citations
TL;DR: In this article, the cyclophosphathiazenes Ph2PS2N3(2) and 1,5(Ph2P)2S2N4 (3) are isolated from the same reaction mixture under reflux conditions.
Abstract: Tetrasulfurtetranitride, S4N4 reacts with (2-pyridylamino)-diphenylphosphine in MeCN at room temperature to form the cyclotrithiazene (NC5H4NH)-Ph2PN-S3N3 (1) in good yield. By contrast, the cyclophosphathiazenes Ph2PS2N3(2) and 1,5(Ph2P)2S2N4 (3) are isolated from the same reaction mixture under reflux conditions. In solution, compound 1 is found to be transformed into 2. The reaction of S4N4 with (2-pyridylamino)phenyl(dicyclohexylamino)phosphine in MeCN at room temperature affords Ph(DCA)PS2N3 (4) (DCA = dicylohexylamino) as the only reaction product. This on treatment with norbornadiene produces the addition product Ph(DCA)PS2N3.C7H8 (5). The structure of 4 has been established by X-ray diffraction. Its PSN ring adopts a skew boat conformation with S-N bond lengths varying from 1.574(4) to 1.606(4) angstrom. The mean value of the endocyclic P-N bonds amounts to 1.618(3) angstrom.
8 citations