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Research draft

alkyne

vr.tr.alkyne · PHY.MAT

Let an agent explain alkynes and their structure, relay properties, reactions and uses from organic chemistry references, describe naming and examples, and distinguish alkynes from alkenes, alkanes and nitriles.

Thing Registry Physical world and living systems

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify

Researched by: Claude

Purpose and description

Let an agent explain alkynes and their structure, relay properties, reactions and uses from organic chemistry references, describe naming and examples, and distinguish alkynes from alkenes, alkanes and nitriles.

An unsaturated hydrocarbon containing at least one carbon-carbon triple bond, with the general formula CnH2n-2 for acyclic monoalkynes, the simplest being acetylene or ethyne followed by propyne, butyne and longer chains such as heptyne, octyne and the decynes, with the ethynyl radical as the corresponding fragment; alkynes are linear at the triple bond, more acidic at terminal positions than alkenes, and undergo addition, coupling and click reactions that make them valuable in synthesis and materials.

What it is for: Not applicable; a class of compounds.

It can be explain structure and naming; relay properties and reactions; describe uses; distinguish related classes.

Distinguishing features

Triple bond

Linear geometry

Terminal acidity

Rich reactivity

What it looks like

Not a visible object; gases or liquids for small members.

Physical character

general formula: CnH2n-2 formula - acyclic monoalkynes

C-C triple bond length: about 120 pm

terminal alkyne pKa: about 25 value

acetylene boiling point: -84 C

How it is recognised

Hydrocarbons with a triple bond

Acetylene, propyne, heptyne, octyne, 2-decyne, 4-decyne, ethynyl radical

Alkenes have double bonds; alkanes are saturated; nitriles have a carbon-nitrogen triple bond

Related models

is a kind of - in registry terms

aliphatic hydrocarbon

is a kind of - in registry terms

acyclic compound

is exemplified by - the simplest alkyne

acetylene

is contrasted with - with a double bond

alkene

In practice

Families and kinds

terminal alkynes such as propyne and 1-octyne

internal alkynes such as 2-decyne and 4-decyne

cycloalkynes

polyynes and diynes

the ethynyl radical and alkynyl groups

alkynes in natural products and materials

Identifiers

ChEBI CHEBI:33644 alkyne

Standards and regulation

IUPAC nomenclature for alkynes

Safety rules for acetylene storage and handling

Failure modes and hazards

Explosive decomposition of acetylene under pressure

Confusing alkynes with alkenes or nitriles

Metal acetylide explosives in laboratories

Also called

ethynyl radical4-decyne2-decyneoctynepropyneheptynenonynedecyneshexyne3-methyl-1-butynepropynylidynepentynebutyneAcetylene-d21,3-Pentadiyne2-tetradecyne1-Penten-3-yneBut-2-yn-1-yl radicaloct-2-yneoct-3-yneoct-1-yneoct-4-yne3-heptynehept-2-yne1-nonyne2-nonyne3-Nonyne4-nonyne3-decynehex-2-yne3,3-dimethyl-1-butyne

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Understand What alkynes are.

Science.

Definition

Definition and naming.

Definition

Definition.

  1. What are alkynes, how are they named, and how do they differ from alkenes, alkanes and nitriles? definition
  2. Is the question about alkynes in general, a specific compound or a reaction? boundary

Structure

Structure and properties.

Structure

Structure.

  1. How does the triple bond give alkynes their geometry, acidity and physical properties? definition
  2. Which entry fits the specific compound? action
React Reactions.

Science.

Addition

Addition and hydrogenation.

Addition

Addition.

  1. How do alkynes undergo hydrogenation, hydration, halogenation and hydrohalogenation? provenance
  2. Which references are standard? provenance

Coupling

Coupling and click reactions.

Coupling

Coupling.

  1. How are alkynes used in Sonogashira coupling, alkyne metathesis and azide-alkyne click chemistry? provenance
  2. Which sources are cited? provenance
Use Uses.

Application.

Industry

Industry.

Industry

Industry.

  1. How are acetylene and other alkynes used in welding, chemicals and materials? provenance
  2. Which entry fits acetylene? action

Synthesis

Synthesis and biology.

Synthesis

Synthesis.

  1. How are alkynes used in drug synthesis, natural products and bioorthogonal labelling? provenance
  2. Which entry fits click chemistry? action
Context Safety and history.

Context.

Safety

Safety.

Safety

Safety.

  1. What hazards do acetylene and acetylides pose, and how are they handled? provenance
  2. Which entry fits acetylene safety? action

History

History.

History

History.

  1. How were acetylene and alkyne chemistry discovered and developed? provenance
  2. Which entry fits the history of organic chemistry? action

What the second pass must settle

  • Should acetylene and click chemistry be separate primary entries?
  • How should chemistry references be linked?
  • The registry entry has merged aliases naming specific compounds and a radical; should they be split off?
Draft as JSON