Definition

1. Noun:
   • A type of chemical reaction: An elimination reaction is a fundamental organic chemical process in which a single molecule breaks down, or decomposes, to form two distinct, smaller molecules. This typically involves the removal of atoms or groups of atoms from adjacent carbon atoms, resulting in the formation of a multiple bond (like a double or triple bond) between those carbons.

Usage and Examples

• Noun:
  • The dehydration of an alcohol to form an alkene is a classic example of an elimination reaction.
  • In the laboratory, chemists often study the kinetics of an elimination reaction to understand its mechanism.
  • The conversion of an alkyl halide to an alkene via treatment with a strong base proceeds through an elimination reaction.

Advanced Usage

• "undergo elimination": Describes a molecule participating in this type of reaction.
  • The substrate can undergo elimination under these basic conditions.
• "E1 and E2 mechanisms": Refers to the two primary mechanistic pathways for elimination reactions, which are key concepts in advanced organic chemistry.
  • The reaction follows an E2 elimination mechanism, which is concerted and bimolecular.

Variants and Related Words

• Eliminate (verb): To remove or get rid of something. In chemistry, it specifically refers to the loss of atoms from a molecule.
  • The base helps eliminate a hydrogen atom and a halide ion from the molecule.
• Elimination (noun, general): The act of removing or excluding something.
  • The elimination of waste products is essential for biological systems.

Synonyms

• Decomposition reaction: A broader term for a reaction where a compound breaks down into simpler substances, which includes elimination as a specific subtype.
• β-Elimination: A more specific synonym often used when the atoms being removed are from adjacent (alpha and beta) carbon atoms.

Related Phrases and Concepts

• "Elimination versus substitution": A fundamental dichotomy in organic reaction mechanisms, where a molecule can either lose atoms (elimination) or have one atom/group replaced by another (substitution).
  • The competition between elimination and substitution reactions depends on the structure of the substrate and the reaction conditions.

Noun

1. a chemical reaction in which a molecule decomposes to two different molecules