{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T22:44:49Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 2,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T23:50:00Z",
      "ingestedAt": "2026-10-05T20:48:17+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-07T11:39:57+00:00",
        "engine": "codex",
        "fields": [
          "definition"
        ],
        "answering_review": "61576ff7034c08410f6715141fc06fb5e413a4c4b2040b54455c6a58c128c77d"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T12:16:34+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q81406",
    "registryId": "vr.tr.alkene",
    "name": "alkene",
    "version": "0.2.0-wave.2",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.MAT"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q81406/",
  "model": {
    "registry_id": "vr.tr.alkene",
    "name": "alkene",
    "purpose": "Let an agent explain alkenes and their chemistry, name and identify alkene isomers, describe reactions and industrial uses, and give safety guidance.",
    "definition": "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.",
    "what_it_is_for": "Hydrocarbons with double bonds.",
    "affordances": [
      "explain alkene structure and isomerism",
      "name and identify alkenes",
      "describe reactions and uses",
      "give safety guidance"
    ],
    "distinguishing_features": [
      "Double bond",
      "Geometric isomerism",
      "Addition chemistry",
      "Polymer feedstock"
    ],
    "appearance": "Gases or volatile liquids for small alkenes; waxy solids for long chains.",
    "visual_identification": [
      "Carbon-carbon double bond",
      "Addition reactions",
      "Alkanes are saturated; alkynes have triple bonds"
    ],
    "physical_properties": [
      {
        "quantity": "Boiling temperature",
        "unit": "K",
        "typical_range": "",
        "note": "Boiling temperature is measured at a stated pressure for the identified alkene and depends on molecular structure."
      },
      {
        "quantity": "Melting temperature",
        "unit": "K",
        "typical_range": "",
        "note": "Melting temperature is measured by thermal analysis for a specified alkene, isomer composition and purity."
      },
      {
        "quantity": "Mass density",
        "unit": "kg/m3",
        "typical_range": "",
        "note": "Density is measured as mass per unit volume at a stated temperature, pressure and physical phase."
      }
    ],
    "families_and_kinds": [
      "simple alkenes such as ethene and propene",
      "butenes and pentenes with cis and trans isomers",
      "long-chain alkenes",
      "dienes and polyenes",
      "cycloalkenes"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "aliphatic hydrocarbon",
        "why": "category"
      },
      {
        "relation": "is a kind of",
        "target": "olefin",
        "why": "category"
      },
      {
        "relation": "is related to",
        "target": "nitrile",
        "why": "another functional group class"
      },
      {
        "relation": "is related to",
        "target": "refining",
        "why": "produced by cracking"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "Chemical safety data sheet requirements",
      "Flammable gas handling rules",
      "IUPAC nomenclature"
    ],
    "failure_modes_and_hazards": [
      "Flammability and explosion",
      "Confusing cis and trans isomers",
      "Pressurised gas hazards"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Report an alkene's structure, isomers and properties from reliable chemistry sources.",
        "Point to the safety data sheet for an alkene before handling."
      ],
      "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."
      ],
      "requires_human": [
        "Any physical handling of pressurised or bulk alkene gases."
      ]
    },
    "ethics": {
      "considerations": [
        "Flammable gases put workers and neighbours of plants at risk of fire and explosion.",
        "Petrochemical production affects air quality in nearby communities."
      ],
      "affected_parties": [
        "Chemical workers",
        "Communities near plants",
        "Students"
      ]
    },
    "owners": {
      "steward": "Nobody owns the class; each plant operator answers for the alkenes it holds.",
      "master_systems": [
        "Chemical substance inventories"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q81406: alkene",
      "url": "https://www.wikidata.org/wiki/Q81406",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Alkene",
      "url": "https://en.wikipedia.org/wiki/Alkene",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "chemistry",
        "name": "Chemistry",
        "description": "Structure and isomerism.",
        "rationale": "Definitions.",
        "layers": [
          {
            "id": "structure",
            "name": "Structure",
            "description": "The double bond.",
            "findings": [
              {
                "id": "structure-finding",
                "name": "Structure",
                "description": "Structure.",
                "questions": [
                  {
                    "text": "What defines an alkene, and how do its properties follow from the double bond?",
                    "kind": "definition"
                  },
                  {
                    "text": "What are cis and trans isomers, and how are they named?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "name",
            "name": "Name",
            "description": "Naming alkenes.",
            "findings": [
              {
                "id": "name-finding",
                "name": "Name",
                "description": "Naming.",
                "questions": [
                  {
                    "text": "What is the IUPAC name of this alkene, and what is its structure?",
                    "kind": "action"
                  },
                  {
                    "text": "Is this molecule an alkene?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "reactions",
        "name": "Reactions",
        "description": "Alkene reactions.",
        "rationale": "Reactivity.",
        "layers": [
          {
            "id": "addition",
            "name": "Addition",
            "description": "Addition reactions.",
            "findings": [
              {
                "id": "addition-finding",
                "name": "Addition",
                "description": "Addition.",
                "questions": [
                  {
                    "text": "How do alkenes undergo addition of hydrogen, halogens, water and acids, and what rule governs regiochemistry?",
                    "kind": "definition"
                  },
                  {
                    "text": "How are alkenes tested for in the laboratory?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "polymer",
            "name": "Polymer",
            "description": "Polymerisation.",
            "findings": [
              {
                "id": "polymer-finding",
                "name": "Polymer",
                "description": "Polymerisation.",
                "questions": [
                  {
                    "text": "How do alkenes polymerise into plastics such as polyethylene and polypropylene?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits a specific polymer?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "industry",
        "name": "Industry",
        "description": "Production and use.",
        "rationale": "Applications.",
        "layers": [
          {
            "id": "production",
            "name": "Production",
            "description": "Making alkenes.",
            "findings": [
              {
                "id": "production-finding",
                "name": "Production",
                "description": "Production.",
                "questions": [
                  {
                    "text": "How are alkenes produced by cracking and dehydrogenation, and how large is the industry?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which alkenes are most important?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "safety",
            "name": "Safety",
            "description": "Handling alkenes.",
            "findings": [
              {
                "id": "safety-finding",
                "name": "Safety",
                "description": "Safety.",
                "questions": [
                  {
                    "text": "How should alkene gases and liquids be handled and stored safely?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Is there a leak or exposure now?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "learn",
        "name": "Learn",
        "description": "Teaching and nature.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "nature",
            "name": "Nature",
            "description": "Alkenes in nature.",
            "findings": [
              {
                "id": "nature-finding",
                "name": "Nature",
                "description": "Nature.",
                "questions": [
                  {
                    "text": "Which alkenes occur naturally, such as ethene as a plant hormone and terpenes?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What roles do they play?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "teach",
            "name": "Teach",
            "description": "Teaching.",
            "findings": [
              {
                "id": "teach-finding",
                "name": "Teach",
                "description": "Teaching.",
                "questions": [
                  {
                    "text": "How can alkene chemistry be taught with models and experiments?",
                    "kind": "action"
                  },
                  {
                    "text": "Which misconceptions arise?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should individual alkenes be separate entries?",
    "How should safety data be linked?",
    "How should reaction databases be linked?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}