Definition of cyclopentadiene in English:


Pronunciation /ˌsīkləˌpentəˈdīēn/ /ˌsiklə-/ /ˌsaɪkloʊˌpɛntəˈdaɪin/


  • A colorless toxic liquid derived from the distillation of coal tar, insoluble in water, soluble in alcohol, and used in the manufacture of insecticides and resins.

    • ‘Sodium methylate and then cyclopentadiene are added, and ferrocene ultimately precipitates out of the solution.’
    • ‘The cyclopentadienes are prepared by reaction with hydrocarbylating agents or alcohols.’
    • ‘Phenyl-substituted cyclopentadienes are proved to form phenylated pyrylium cations in the presence of silver perchlorate by insertion of an oxygen atom into the cyclopentadiene-ring.’
    • ‘Nucleophiles can be added, leading to coordinated cyclopentadienes, which may be liberated by oxidation and used in further synthesis.’



/ˌsīkləˌpentəˈdīēn/ /ˌsiklə-/ /ˌsaɪkloʊˌpɛntəˈdaɪin/