acyl halide

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acyl halide

A chemist carefully adds an acyl halide to a reaction flask.

Definition
  1. Noun:
    • A class of organic compounds: An acyl halide is a specific type of organic compound characterized by the functional group -COX, where a carbonyl group (C=O) is bonded to a halogen atom (X, such as fluorine, chlorine, bromine, or iodine).
Usage
  • Acyl halides are reactive intermediates used primarily in chemical synthesis, especially in acylation reactions to form other carbonyl-containing compounds like esters and amides.
  • The term is used in scientific and industrial chemistry contexts.
Examples
  • Noun:
    • Acetyl chloride is a common acyl halide used in organic synthesis.
    • The chemist handled the acyl halide with care due to its reactivity and lachrymatory effects.
    • The reaction mechanism involves the formation of an acyl halide intermediate.
Advanced Usage
  • Naming Conventions: Acyl halides are systematically named by taking the name of the parent carboxylic acid, replacing the "-ic acid" ending with "-yl halide" (e.g., ethanoic acid becomes ethanoyl chloride).
  • "Acid halide": This is a common synonym for "acyl halide" and is used interchangeably in chemical literature.
Variants and Related Words
  • Acid halide (n): A direct synonym for acyl halide.
  • Acyl chloride (n): The most common and frequently studied type of acyl halide where the halogen is chlorine.
  • Acyl group (n): The R-CO- moiety present in an acyl halide and other derivatives.
Synonyms
  • Acid halide: The most direct synonym.
  • Haloformyl compound: A less common systematic name.
Related Phrases / Terminology
  • Acylation reaction: A chemical reaction where an acyl group (R-CO-) is introduced into a molecule, often using an acyl halide as the reagent.
    • Friedel-Crafts acylation uses acyl halides to introduce ketone groups into aromatic rings.
  • Nucleophilic acyl substitution: The fundamental reaction mechanism by which acyl halides and other carboxylic acid derivatives react.
    • The high reactivity of acyl halides is explained by their susceptibility to nucleophilic acyl substitution.
acyl halide

A chemist carefully adds an acyl halide to a reaction flask.

Noun
  1. organic compounds containing the group -COX where X is a halogen atom

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