vinyl radical

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vinyl radical

A chemist draws the vinyl radical structure on a whiteboard.

Definition

Noun: - A univalent chemical radical derived from ethylene: A specific, reactive group of atoms (a radical) that forms part of many larger molecules. It is characterized by the structure H₂C=CH– and is derived from ethylene (ethene).

Usage
  • This term is used almost exclusively in technical, scientific contexts such as organic chemistry, polymer science, and materials engineering.
  • It refers to the fundamental molecular unit that, when repeated, forms the polymer polyvinyl chloride (PVC) and is part of other vinyl compounds.
Examples
  • The vinyl radical is the essential building block for creating PVC plastics.
  • In this reaction, the molecule attaches via a vinyl radical.
  • The stability of the vinyl radical influences the polymerization process.
Advanced Usage
  • In advanced chemical nomenclature, the term is synonymous with the "ethenyl" group, though "vinyl" remains the common industrial and historical term.
  • It is often discussed in the context of free-radical polymerization, where vinyl radicals are key reactive intermediates.
Variants and Related Words
  • Vinyl (noun/adjective): Commonly refers to materials (like PVC records or flooring) made from polymers of vinyl compounds, or more broadly to compounds containing the vinyl radical.
    • The chemist works with vinyl monomers.
    • I found an old vinyl record.
  • Vinyl polymer (noun): A polymer where the repeating unit is derived from a vinyl compound (e.g., polyethylene, PVC, polystyrene).
  • Vinyl compound (noun): Any organic compound that contains the vinyl radical, such as vinyl chloride (H₂C=CHCl).
Synonyms
  • Ethenyl group: The systematic IUPAC name for the vinyl radical.
  • CH₂=CH– group: A structural representation of the radical.
Notes on Meaning
  • The term "vinyl radical" is highly specific. In everyday language, the word "vinyl" alone almost never refers to this chemical radical but to the plastic material made from its polymers.
  • It is a radical, meaning it has one bonding site to attach to another atom or group within a molecule.
vinyl radical

A chemist draws the vinyl radical structure on a whiteboard.

Noun
  1. a univalent chemical radical derived from ethylene

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