Definition

1. Noun:
   • The univalent unsaturated organic radical C₃H₅; derived from propylene: In organic chemistry, "allyl" refers to a specific molecular group or substituent with the formula –CH₂–CH=CH₂. It is a fragment derived from propylene and is characterized by a carbon-carbon double bond adjacent to a methylene (–CH₂) group.

Usage Examples

• Noun:
  • The compound contains an allyl group attached to the oxygen atom.
  • Allyl chloride is an important industrial chemical.
  • The reactivity of the molecule is increased by the presence of the allyl radical.

Advanced Usage

• "Allylic position": Refers to the carbon atom adjacent to a carbon-carbon double bond in an organic molecule.
  • The hydrogen on the allylic carbon is more reactive.
• "Allylic rearrangement": A specific type of organic reaction where the double bond and a substituent change positions within an allyl system.
  • The mechanism involves an allylic rearrangement.

Variants and Related Words

• Allylic (adj): Pertaining to, characteristic of, or containing an allyl group or its position.
  • The molecule exhibits allylic strain.
• Allylation (n): A chemical reaction that introduces an allyl group into a compound.
  • The synthesis proceeds via a key allylation step.

Synonyms

• 2-Propenyl group: A systematic name for the allyl group, emphasizing its structure derived from propene.
• CH₂=CH–CH₂– group: A structural formula representation synonymous with the allyl radical.

Related Phrases and Compounds

• Allyl alcohol: An organic compound with the formula CH₂=CHCH₂OH.
• Allyl isothiocyanate: The compound responsible for the pungent taste of mustard and horseradish.
• Diallyl: A term indicating two allyl groups in a molecule.
  • Diallyl ether is a useful reagent.

Noun

1. the univalent unsaturated organic radical C3H5; derived from propylene