• Cyclopentadiene is an organic compound with the formula C5H6. It is often abbreviated CpH because the cyclopentadienyl anion is abbreviated Cp−. This...
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  • Thumbnail for Trimethylsilyl cyclopentadiene
    Trimethylsilyl cyclopentadiene is an organosilicon compound with the chemical formula C5H5Si(CH3)3. It exists as a colorless liquid. It is used in the...
    4 KB (266 words) - 08:37, 29 December 2024
  • Thumbnail for Diels–Alder reaction
    dimethylformamide and ethylene glycol, and even in water. The reaction of cyclopentadiene and butenone for example is 700 times faster in water relative to 2...
    69 KB (7,907 words) - 05:26, 2 December 2024
  • the dimer "A−A". Dicyclopentadiene is an asymmetrical dimer of two cyclopentadiene molecules that have reacted in a Diels-Alder reaction to give the product...
    12 KB (1,298 words) - 04:28, 1 January 2025
  • Thumbnail for Dicyclopentadiene
    Dicyclopentadiene (category Cyclopentadienes)
    structure was deduced in 1931. The spontaneous dimerization of neat cyclopentadiene at room temperature to form dicyclopentadiene proceeds to around 50%...
    13 KB (1,088 words) - 11:03, 3 January 2025
  • Thumbnail for Metallocene
    starting point is the cracking of dicyclopentadiene, the dimer of cyclopentadiene. Cyclopentadiene is deprotonated by strong bases or alkali metals. MCl2 + 2 NaC5H5...
    22 KB (2,174 words) - 00:45, 15 January 2025
  • Thumbnail for Bulky cyclopentadienyl ligands
    derivatives such as (C5H2tBu3)2Fe2N2. The (tert-butyl)cyclopentadiene is prepared by alkylation of cyclopentadiene with tert-butyl bromide in the presence of sodium...
    4 KB (328 words) - 19:01, 27 September 2020
  • 5H 5]− and abbreviated as Cp−. It is formed by the deprotonation of cyclopentadiene. The cyclopentadienyl anion is a ligand which binds to a metal in organometallic...
    3 KB (278 words) - 03:18, 11 December 2024
  • norbornadiene in a sequence of one DA reaction and two retro-DA reactions to cyclopentadiene and a pyridazine with exchange of an acetylene unit: With norbornadiene...
    3 KB (323 words) - 15:40, 5 October 2024
  • Thumbnail for Hexachlorocyclopentadiene
    produced today. Hexachlorocyclopentadiene is prepared by chlorination of cyclopentadiene to give 1,1,2,3,4,5-octachlorocyclopentane, which in a second step...
    23 KB (2,951 words) - 10:59, 3 January 2025
  • Thumbnail for Hückel's rule
    electrons is planar and readily generated from the unusually acidic cyclopentadiene (pKa 16), while the corresponding cation with four π electrons is destabilized...
    13 KB (1,582 words) - 10:30, 17 January 2025
  • hafnium metal centers. Depending on the placement of the catalyst's cyclopentadiene ligands, it can produce polypropylenes with different tacticity. 1...
    83 KB (9,185 words) - 20:39, 20 January 2025
  • Thumbnail for Norbornene
    significant reactivity. Norbornene is made by a Diels–Alder reaction of cyclopentadiene and ethylene. Many substituted norbornenes can be prepared similarly...
    5 KB (429 words) - 22:09, 29 January 2025
  • Thumbnail for Cyclopentene
    rearrangement. It can also be produced by the catalytic hydrogenation of cyclopentadiene. The polymerization of cyclopentene by Ziegler-Natta catalysts yields...
    5 KB (371 words) - 03:09, 14 November 2024
  • 0425 - CYCLOHEXANONE". www.inchem.org. Retrieved 18 March 2018. "MSDS Cyclopentadiene". ox.ac.uk. Archived from the original on 7 December 2010. Retrieved...
    26 KB (1,830 words) - 11:30, 7 October 2024
  • 1940s by unknown researchers at Union Carbide, who tried to pass hot cyclopentadiene vapor through an iron pipe. The vapor reacted with the pipe wall, creating...
    53 KB (5,188 words) - 14:15, 21 January 2025
  • the detection of carbanions in solution is proton NMR. A spectrum of cyclopentadiene in DMSO shows four vinylic protons at 6.5 ppm and two methylene bridge...
    32 KB (3,469 words) - 22:24, 16 October 2024
  • Thumbnail for Sodium cyclopentadienide
    commercially available as a solution in THF. It is prepared by treating cyclopentadiene with sodium: 2 Na + 2 C5H6 → 2 NaC5H5 + H2 The conversion can be conducted...
    8 KB (731 words) - 23:25, 16 December 2024
  • Thumbnail for Organoactinide chemistry
    reaction schemes: Most trivalent f block elements form compounds with cyclopentadiene with the formula M(Cp)3. These complexes have been isolated up to californium...
    15 KB (1,599 words) - 15:56, 19 January 2025
  • Lutheran Church—Missouri Synod CPH railmotor, a diesel train in Australia Cyclopentadiene, C5H6 (the cyclopentadienyl radical, C5H5, is often abbreviated Cp)...
    1 KB (149 words) - 23:11, 18 July 2024
  • Thumbnail for Promethocene
    radioactive and stable in dry air. Promethocene is different from cyclopentadiene complexes of general transition metals and is considered to be ionically...
    3 KB (176 words) - 16:02, 19 January 2025
  • C5H6 (molar mass: 66.10 g/mol, exact mass: 66.04695 u) may refer to: Cyclopentadiene Cyclopropylacetylene [1.1.1]propellane Cyclopentyne This set index...
    329 bytes (60 words) - 20:01, 17 March 2021
  • Thumbnail for Nickelocene
    are usually assigned as cyclopentadienyl anions (Cp−), related to cyclopentadiene by deprotonation. The structure is similar to ferrocene. In terms of...
    8 KB (650 words) - 03:53, 12 December 2024
  • Thumbnail for Dimethyl carbate
    can be prepared by the Diels–Alder reaction of dimethyl maleate and cyclopentadiene. Merck Index, 11th Edition, 3230 Inukai, Takashi; Kojima, Takeshi (1966)...
    2 KB (60 words) - 02:38, 14 February 2023
  • FMO theory. The Diels–Alder reaction between maleic anhydride and cyclopentadiene is allowed by the Woodward–Hoffmann rules because there are six electrons...
    10 KB (1,343 words) - 18:11, 14 December 2024
  • Thumbnail for Ethylidene norbornene
    which in turn is obtained by the Diels-Alder reaction of butadiene and cyclopentadiene. It is a monomer that used in the production of the commercial polymer...
    3 KB (196 words) - 11:39, 22 December 2024
  • Thumbnail for Alkali metal
    metals and their hydrides react with acidic hydrocarbons, for example cyclopentadienes and terminal alkynes, to give salts. Liquid ammonia, ether, or hydrocarbon...
    214 KB (23,532 words) - 22:45, 29 January 2025
  • Thumbnail for Methylcyclopentadiene
    Methylcyclopentadiene (category Cyclopentadienes)
    denoted as Cp′), commonly found in organometallic chemistry. As with cyclopentadiene, methylcyclopentadiene is prepared by thermal cracking of its Diels–Alder...
    5 KB (285 words) - 08:55, 2 September 2024
  • Thumbnail for Alkene
    is the [4+2]-cycloaddition of singlet oxygen with a diene such as cyclopentadiene to yield an endoperoxide: Terminal alkenes are precursors to polymers...
    48 KB (5,160 words) - 20:06, 22 December 2024
  • Thumbnail for Pentamethylcyclopentadiene
    Pentamethylcyclopentadiene (category Cyclopentadienes)
    formula is also written Cp*H. In contrast to less-substituted cyclopentadiene derivatives, Cp*H is not prone to dimerization. Pentamethylcyclopentadiene...
    11 KB (849 words) - 08:30, 14 December 2024