alkyne
Definition
Noun: A type of hydrocarbon containing at least one carbon-carbon triple bond in its molecular structure. Alkynes are unsaturated compounds with the general formula CₙH₂ₙ₋₂. The simplest and most important alkyne is acetylene.
Usage
Alkynes are primarily discussed in the context of organic chemistry. The word is used as a countable noun to refer to this specific class of chemical compounds. * Acetylene is the most common alkyne. * The triple bond in an alkyne is highly reactive. * Chemists study the properties and reactions of alkynes.
Examples
- The laboratory synthesis involved a series of alkynes as intermediates.
- Alkynes can undergo addition reactions with halogens.
- The distinguishing feature of an alkyne is its carbon-carbon triple bond.
Advanced Usage
- Terminal alkyne: An alkyne where the triple bond is at the end of the carbon chain (e.g., propyne, HC≡C-CH₃).
- Internal alkyne: An alkyne where the triple bond is between two carbon atoms that are not terminal (e.g., 2-butyne, CH₃-C≡C-CH₃).
Variants and Related Words
- Alkynyl (adjective): Pertaining to or derived from an alkyne by removal of a hydrogen atom. Example:
- Acetylene (noun): The common name for the simplest alkyne, C₂H₂ (systematic name: ethyne).
Synonyms
- Acetylene series (historical/less common term)
- Alkyne hydrocarbon
Different Meanings
The word "alkyne" has a single, specific meaning in scientific terminology (organic chemistry) and is not used in other contexts.
Noun
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a colorless flammable gas used chiefly in welding and in organic synthesis
