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  2. Alkyne trimerisation - Wikipedia

    en.wikipedia.org/wiki/Alkyne_trimerisation

    Benzyne, generated in situ from a benzene ring bearing ortho-distributed triflate and trimethylsilyl substituents, can be used to generate an aryne in place of an acetylene and combined with a suitable diyne. Such a benzene derivative reacts with 1,7-octadiyne in the presence of a suitable catalyst to generate a naphthalene system. [15]

  3. Walter Reppe - Wikipedia

    en.wikipedia.org/wiki/Walter_Reppe

    If a competing ligand such as triphenylphosphine is present in sufficient proportion to occupy one coordination site, then room is left for only three acetylene molecules, and these come together to form benzene. This reaction provided an unusual route to benzene and especially to cyclooctatetraene, which was difficult to prepare otherwise.

  4. Acetylene - Wikipedia

    en.wikipedia.org/wiki/Acetylene

    Acetylene is a moderately common chemical in the universe, often associated with the atmospheres of gas giants. [50] One curious discovery of acetylene is on Enceladus, a moon of Saturn. Natural acetylene is believed to form from catalytic decomposition of long-chain hydrocarbons at temperatures of 1,700 K (1,430 °C; 2,600 °F) and above ...

  5. Trimer (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Trimer_(chemistry)

    In chemistry, a trimer (/ ˈ t r aɪ m ər /; from Ancient Greek tri- 'three' and -mer 'parts') is a molecule or polyatomic anion formed by combination or association of three molecules or ions of the same substance.

  6. Friedel–Crafts reaction - Wikipedia

    en.wikipedia.org/wiki/Friedel–Crafts_reaction

    This is accomplished by the Gattermann-Koch reaction, accomplished by treating benzene with carbon monoxide and hydrogen chloride under high pressure, catalyzed by a mixture of aluminium chloride and cuprous chloride. Simple ketones that could be obtained by Friedel–Crafts acylation are produced by alternative methods, e.g., oxidation, in ...

  7. Template reaction - Wikipedia

    en.wikipedia.org/wiki/Template_reaction

    This simplistic mechanistic hypotheses was influential in the development of these catalytic reactions. For example, if a competing ligand such as triphenylphosphine were added to occupy one coordination site, then only three molecules of acetylene could bind, and these come together to form benzene (see Reppe chemistry). [8]

  8. Benzene - Wikipedia

    en.wikipedia.org/wiki/Benzene

    Benzene is an organic chemical compound with the molecular formula C 6 H 6. ... Alkyne trimerisation of acetylene gives benzene. Complete decarboxylation of mellitic ...

  9. Phenylacetylene - Wikipedia

    en.wikipedia.org/wiki/Phenylacetylene

    Phenylacetylene is a prototypical terminal acetylene, undergoing many reactions expected of that functional group. It undergoes semi hydrogenation over Lindlar catalyst to give styrene . In the presence of base and copper(II) salts, it undergoes oxidative coupling to give diphenylbutadiyne . [ 6 ]