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alkene

vr.tr.alkene · thing-q81406

Let an agent explain alkenes and their chemistry, name and identify alkene isomers, describe reactions and industrial uses, and give safety guidance.

Thing Registry Physical world and living systems PHY.MAT
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Chemistry Structure and isomerism.

Structure

The double bond.

Structure

Structure.

  1. What defines an alkene, and how do its properties follow from the double bond? definition
  2. What are cis and trans isomers, and how are they named? definition

Name

Naming alkenes.

Name

Naming.

  1. What is the IUPAC name of this alkene, and what is its structure? action
  2. Is this molecule an alkene? definition
Reactions Alkene reactions.

Addition

Addition reactions.

Addition

Addition.

  1. How do alkenes undergo addition of hydrogen, halogens, water and acids, and what rule governs regiochemistry? definition
  2. How are alkenes tested for in the laboratory? action

Polymer

Polymerisation.

Polymer

Polymerisation.

  1. How do alkenes polymerise into plastics such as polyethylene and polypropylene? definition
  2. Which entry fits a specific polymer? action
Industry Production and use.

Production

Making alkenes.

Production

Production.

  1. How are alkenes produced by cracking and dehydrogenation, and how large is the industry? provenance
  2. Which alkenes are most important? provenance

Safety

Handling alkenes.

Safety

Safety.

  1. How should alkene gases and liquids be handled and stored safely? provenance
  2. Is there a leak or exposure now? boundary
Learn Teaching and nature.

Nature

Alkenes in nature.

Nature

Nature.

  1. Which alkenes occur naturally, such as ethene as a plant hormone and terpenes? provenance
  2. What roles do they play? provenance

Teach

Teaching.

Teach

Teaching.

  1. How can alkene chemistry be taught with models and experiments? action
  2. Which misconceptions arise? provenance

Classifiers Filled

Family
Thing Registry
Category
Physical world and living systems
Entry kind
thing
Plane
PHY
Domain
PHY.MAT
Other names and narrower kinds
dicyclobutylidene, cis-2-butene, trans-2-butene, Tetradec-4-ene, 2-pentene, 1-undecene, dodecene, 1-hexene, 1-eicosene, heptadecene, 1-hexadecene, (7E)-7-tetradecene

What it is Filled

An unsaturated hydrocarbon containing exactly one carbon-carbon double bond, such as ethene, propene, the butenes and longer chain alkenes, with cis and trans isomers where substitution allows, characterised by addition reactions across the double bond; alkenes are produced by cracking petroleum and are the feedstock for polymers, plastics and many chemicals.

Why it exists Filled

Let an agent explain alkenes and their chemistry, name and identify alkene isomers, describe reactions and industrial uses, and give safety guidance.

Distinguishing features Filled

  • Double bond
  • Geometric isomerism
  • Addition chemistry
  • Polymer feedstock

What robots and AI may and may not do Filled

Must not

  • Assist anyone in using alkenes to cause fires or explosions.
  • Confuse cis and trans isomers when reporting a compound.
  • Recommend storing or handling flammable alkene gases outside the safety data guidance.
  • Release alkenes to air or water outside a permit.

Only with a human decision

  • Any physical handling of pressurised or bulk alkene gases.

May

  • Report an alkene's structure, isomers and properties from reliable chemistry sources.
  • Point to the safety data sheet for an alkene before handling.

Moral aspects Filled

  • Flammable gases put workers and neighbours of plants at risk of fire and explosion.
  • Petrochemical production affects air quality in nearby communities.

Who is affected

  • Chemical workers
  • Communities near plants
  • Students

Owners Filled

Steward

Nobody owns the class; each plant operator answers for the alkenes it holds.

Master systems

  • Chemical substance inventories

Links to other meta-models Filled

parent

  • Q11797724 - registry parent class
  • Q344942 - registry parent class
  • Q47165582 - registry parent class

related

  • aliphatic hydrocarbon - category
  • olefin - category
  • nitrile - another functional group class
  • refining - produced by cracking

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.alkene
  • Wikidata: Q81406 (https://www.wikidata.org/wiki/Q81406)

Direct properties required Filled

  • Boiling temperature: K - Boiling temperature is measured at a stated pressure for the identified alkene and depends on molecular structure.
  • Melting temperature: K - Melting temperature is measured by thermal analysis for a specified alkene, isomer composition and purity.
  • Mass density: kg/m3 - Density is measured as mass per unit volume at a stated temperature, pressure and physical phase.

Recognition required Filled

  • Carbon-carbon double bond
  • Addition reactions
  • Alkanes are saturated; alkynes have triple bonds
  • Gases or volatile liquids for small alkenes; waxy solids for long chains.

Capabilities and actions required Filled

  • explain alkene structure and isomerism
  • name and identify alkenes
  • describe reactions and uses
  • give safety guidance

Hazards and failure modes required Filled

  • Flammability and explosion
  • Confusing cis and trans isomers
  • Pressurised gas hazards

Standards and interfaces required Filled

  • Chemical safety data sheet requirements
  • Flammable gas handling rules
  • IUPAC nomenclature

Context of use required Filled

  • Hydrocarbons with double bonds.
  • simple alkenes such as ethene and propene
  • butenes and pentenes with cis and trans isomers
  • long-chain alkenes
  • dienes and polyenes
  • cycloalkenes

Sources Filled

  1. Wikidata item Q81406: alkene - identity and sense of the item
  2. Wikipedia: Alkene - general description of the item

Open questions

  • Should individual alkenes be separate entries?
  • How should safety data be linked?
  • How should reaction databases be linked?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q81406/spec.json