{ "model": { "rank": 13732, "code": "thing-q373406", "model_id": "vr.tr.reaction-mechanism", "name": "reaction mechanism", "purpose": "Let an agent explain reaction mechanisms and how they are studied, relay concepts such as intermediates, transition states and rate laws from chemistry references, describe enzyme kinetics and inhibition as the registry aliases name them, and distinguish mechanisms from overall equations, from thermodynamics and from mechanisms in other senses.", "family": "Thing Registry", "category": "Activities and processes", "status": "research-draft", "kind": "thing", "plane": "ACT", "domain": "ACT.PRC", "industry": "", "version": "", "url": "/models/thing/q373406/", "tier": 2, "score": 37, "payload": { "layer": "wikidata", "aliases": [ "enzyme inhibition", "Michaelis–Menten kinetics", "Michaelis-Menten-Monod kinetics" ], "aliasCount": 3, "merged": 3, "knownIn": 37, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q373406", "url": "https://www.wikidata.org/wiki/Q373406", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T14:42:13Z", "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": 4, "engine": "claude" }, "metaModel": { "id": "THING-Q373406", "registryId": "vr.tr.reaction-mechanism", "name": "reaction mechanism", "version": "0.2.0-wave.4", "entryKind": "thing", "family": "Thing Registry", "domain": [ "ACT.PRC" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q373406/", "model": { "registry_id": "vr.tr.reaction-mechanism", "name": "reaction mechanism", "purpose": "Let an agent explain reaction mechanisms and how they are studied, relay concepts such as intermediates, transition states and rate laws from chemistry references, describe enzyme kinetics and inhibition as the registry aliases name them, and distinguish mechanisms from overall equations, from thermodynamics and from mechanisms in other senses.", "definition": "The step-by-step sequence of elementary reactions by which an overall chemical change takes place, describing bond breaking and forming, intermediates and transition states, and, for enzyme-catalysed reactions, kinetic models such as Michaelis-Menten kinetics and its extensions such as Monod kinetics for microbial growth, together with mechanisms of enzyme inhibition; reaction mechanisms are established by kinetics, isotope labelling and spectroscopy.", "what_it_is_for": "Explaining how reactions proceed.", "affordances": [ "explain the concept", "relay methods and concepts", "describe enzyme kinetics", "distinguish related concepts" ], "distinguishing_features": [ "Elementary steps", "Intermediates and transition states", "Kinetic evidence", "Enzyme models" ], "appearance": "Not a visible object; arrow-pushing diagrams and energy profiles.", "visual_identification": [ "Sequence of elementary steps in a reaction", "Intermediates, transition states, Michaelis-Menten kinetics, Monod kinetics, enzyme inhibition", "The overall equation shows only reactants and products; thermodynamics gives feasibility; other mechanisms are unrelated" ], "physical_properties": [ { "quantity": "Michaelis-Menten equation", "typical_range": "1913", "unit": "year", "note": "" }, { "quantity": "Monod equation", "typical_range": "1949", "unit": "year", "note": "microbial growth" }, { "quantity": "inhibition types", "typical_range": "competitive, non-competitive, uncompetitive, mixed", "unit": "list", "note": "" } ], "families_and_kinds": [ "organic reaction mechanisms such as SN1, SN2 and additions", "inorganic and organometallic mechanisms", "chain and radical mechanisms", "enzyme mechanisms and Michaelis-Menten kinetics", "Monod kinetics for microbial growth", "mechanisms of enzyme inhibition" ], "related_models": [ { "relation": "is a kind of", "target": "molecular mechanism", "why": "in registry terms" }, { "relation": "is a kind of", "target": "decomposition", "why": "of a reaction into steps in registry terms" }, { "relation": "is studied by", "target": "chemical kinetics", "why": "and spectroscopy" }, { "relation": "is exemplified by", "target": "SN2 reaction", "why": "a classic mechanism" } ], "identifiers": [], "standards_and_regulation": [ "IUPAC recommendations on mechanism terminology and arrow notation" ], "failure_modes_and_hazards": [ "Presenting proposed mechanisms as proven", "Confusing mechanism with overall equation", "Registry aliases naming kinetic models rather than mechanisms" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "understand", "name": "Understand", "description": "What a reaction mechanism is.", "rationale": "Science.", "layers": [ { "id": "definition", "name": "Definition", "description": "Definition.", "findings": [ { "id": "definition-finding", "name": "Definition", "description": "Definition.", "questions": [ { "text": "What is a reaction mechanism, and how does it differ from the overall equation, thermodynamics and other senses of mechanism?", "kind": "definition" }, { "text": "Is the question about a general concept, a specific mechanism, enzyme kinetics or inhibition?", "kind": "boundary" } ] } ] }, { "id": "concepts", "name": "Concepts", "description": "Concepts.", "findings": [ { "id": "concepts-finding", "name": "Concepts", "description": "Concepts.", "questions": [ { "text": "What are elementary steps, intermediates, transition states, rate-determining steps and catalysis?", "kind": "definition" }, { "text": "Which entry fits the specific concept?", "kind": "action" } ] } ] } ] }, { "id": "methods", "name": "Methods", "description": "Methods.", "rationale": "Science.", "layers": [ { "id": "kinetics", "name": "Kinetics", "description": "Kinetics.", "findings": [ { "id": "kinetics-finding", "name": "Kinetics", "description": "Kinetics.", "questions": [ { "text": "How do rate laws, isotope effects and labelling reveal mechanisms?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "spectroscopy", "name": "Spectroscopy", "description": "Spectroscopy and computation.", "findings": [ { "id": "spectroscopy-finding", "name": "Spectroscopy", "description": "Spectroscopy.", "questions": [ { "text": "How do spectroscopy and computational chemistry characterise intermediates and transition states?", "kind": "provenance" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "enzymes", "name": "Enzymes", "description": "Enzyme kinetics.", "rationale": "Science.", "layers": [ { "id": "michaelis", "name": "Michaelis-Menten", "description": "Michaelis-Menten and Monod.", "findings": [ { "id": "michaelis-finding", "name": "Michaelis-Menten", "description": "Michaelis-Menten.", "questions": [ { "text": "What do the Michaelis-Menten and Monod models describe, and what are their assumptions?", "kind": "provenance" }, { "text": "Which entry fits Michaelis-Menten kinetics?", "kind": "action" } ] } ] }, { "id": "inhibition", "name": "Inhibition", "description": "Enzyme inhibition.", "findings": [ { "id": "inhibition-finding", "name": "Inhibition", "description": "Inhibition.", "questions": [ { "text": "How do competitive, non-competitive and other inhibitors act, and why does it matter for drugs?", "kind": "provenance" }, { "text": "Which entry fits enzyme inhibitor?", "kind": "action" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "Examples and history.", "rationale": "Context.", "layers": [ { "id": "examples", "name": "Examples", "description": "Classic mechanisms.", "findings": [ { "id": "examples-finding", "name": "Examples", "description": "Examples.", "questions": [ { "text": "What are the SN1, SN2, E1, E2 and radical chain mechanisms?", "kind": "provenance" }, { "text": "Which entry fits the specific mechanism?", "kind": "action" } ] } ] }, { "id": "history", "name": "History", "description": "History.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How did Ingold, Hughes and others establish mechanistic chemistry?", "kind": "provenance" }, { "text": "Which entry fits the history of physical organic chemistry?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should Michaelis-Menten kinetics and enzyme inhibition be separate primary entries?", "How should chemistry references be linked?", "The registry entry has merged aliases naming kinetic models; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a reaction mechanism, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain reaction mechanisms and how they are studied, relay concepts such as intermediates, transition states and rate laws from chemistry references, describe enzyme kinetics and inhibition as the registry aliases name them, and distinguish mechanisms from overall equations, from thermodynamics and from mechanisms in other senses.", "characteristics": { "substance": "activity", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: enzyme inhibition, Michaelis–Menten kinetics, Michaelis-Menten-Monod kinetics.", "3 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 37 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a reaction mechanism, and on what evidence are they told apart?" ], "whatItIsMadeOf": "something that happens over time", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "enzyme inhibition", "Michaelis–Menten kinetics", "Michaelis-Menten-Monod kinetics" ] } ], "standing": "Described in 37 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 3 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one reaction mechanism from another, and a reaction mechanism from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a reaction mechanism sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a reaction mechanism from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a reaction mechanism passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a reaction mechanism between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a reaction mechanism, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a reaction mechanism is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "process-and-outcome", "name": "Process, inputs and outcome", "description": "How a reaction mechanism proceeds, what it needs and what it leaves behind.", "rationale": "An activity is known by its steps and its results, and both have to be recordable while it is still running.", "layers": [ { "id": "steps-and-sequence", "name": "Steps and sequence", "description": "The steps of a reaction mechanism, their order and what may run in parallel.", "findings": [ { "id": "steps-and-preconditions", "name": "Steps, preconditions and completion", "description": "What has to be true before each step of a reaction mechanism and what marks it done.", "questions": [ { "id": "steps-and-preconditions-q01", "text": "What identifies and describes a step of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "steps-and-preconditions-q02", "text": "Who or what asserted this about a step of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "steps-and-preconditions-q03", "text": "What may an agent decide or do once a step of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "inputs-and-results", "name": "Inputs, resources and results", "description": "What a reaction mechanism consumes and what it produces.", "findings": [ { "id": "inputs-and-outputs", "name": "Inputs, outputs and side effects", "description": "The resources a reaction mechanism takes and the results it leaves, wanted or not.", "questions": [ { "id": "inputs-and-outputs-q01", "text": "What identifies and describes the inputs and results of a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "inputs-and-outputs-q02", "text": "Who or what asserted this about the inputs and results of a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "inputs-and-outputs-q03", "text": "What may an agent decide or do once the inputs and results of a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What reaction mechanism is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of reaction mechanism are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is reaction mechanism operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of reaction mechanism and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of reaction mechanism?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as reaction mechanism?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a reaction mechanism came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a reaction mechanism and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a reaction mechanism is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a reaction mechanism, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a reaction mechanism, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a reaction mechanism is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }