halogenation

A chemist performs a halogenation reaction in a laboratory.

Definition

Noun (chemistry): - The process of introducing one or more halogen atoms into a compound: "halogenation" refers to a chemical reaction where a halogen element (such as fluorine, chlorine, bromine, or iodine) is added to a molecule, often by substitution or addition.

Usage Examples

• (The chemical process of adding chlorine to methane.)
• (The introduction of halogen atoms is essential for creating certain drugs.)
• (The reaction conditions for adding halogens to organic compounds.)

Advanced Usage

• "Electrophilic halogenation": a specific type of halogenation where the halogen acts as an electrophile, commonly used in aromatic compounds.

  • Benzene undergoes electrophilic halogenation to form bromobenzene. (The halogen atom attaches to the benzene ring via an electrophilic mechanism.)

• "Free-radical halogenation": a reaction mechanism involving free radicals, often used for alkanes.

  • Free-radical halogenation of alkanes can lead to multiple substitution products. (The reaction produces various halogenated compounds due to radical chain reactions.)

Variants and Related Words

• Halogenate (verb): to subject to halogenation.

  • Chemists halogenate alkenes to create halogenated solvents. (They add halogen atoms to the double bond.)

• Halogenated (adjective): having undergone halogenation.

  • Halogenated compounds are often used as flame retardants. (Compounds containing added halogen atoms.)

• Halogen (noun): any of the elements fluorine, chlorine, bromine, iodine, or astatine.

  • Chlorine is a common halogen used in water purification. (A specific halogen element.)

Synonyms

• Halogen addition: the process of adding halogens.
• Halogen substitution: the replacement of another atom with a halogen.

Related Idioms and Collocations

• "Halogenation reaction": a specific chemical reaction involving halogen addition.

  • The halogenation reaction requires careful temperature control. (The process of adding halogens.)

• "Halogenation of alkenes": a common reaction in organic chemistry.

  • The halogenation of alkenes produces dihaloalkanes. (Adding halogens across the double bond.)

Phrasal Verbs (Not applicable; "halogenation" is a noun, not a verb. However, related verb forms exist.)

• Halogenate (transitive verb): to cause halogenation.
  • The factory halogenates the water to kill bacteria. (They add chlorine or other halogens for disinfection.)