{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T11:22:29Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 20.9, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09559-847f-7cc0-a521-44da09e98099\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: molybdenum(II) acetate\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 04", "usd": 0.0, "recall": true }, "codex": { "seconds": 82.3, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09559-8489-75f2-b615-3efe26b358f2\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: molybdenum(II) acetate\nRegistry id: vr.tr.molybdenum-ii-acetate\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into " } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:50:27+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "standards_and_regulation", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:32+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q6896941", "registryId": "vr.tr.molybdenum-ii-acetate", "name": "molybdenum(II) acetate", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q6896941/", "model": { "registry_id": "vr.tr.molybdenum-ii-acetate", "name": "molybdenum(II) acetate", "purpose": "Enable an agent to identify molybdenum(II) acetate, assess whether a sample retains its dimolybdenum tetraacetate identity, and judge its suitability for a proposed use.", "definition": "Molybdenum(II) acetate is the dinuclear coordination compound Mo₂(O₂CCH₃)₄, in which four bridging acetate ligands surround a pair of formally Mo(II) centres joined by a molybdenum-molybdenum quadruple bond.", "scope_statement": "This model owns the substance identity and sample-dependent composition, coordination structure, physical state, stability, and use constraints of molybdenum(II) acetate under registry id vr.tr.molybdenum-ii-acetate in PHY / PHY.MAT.", "in_scope": [ "Dimolybdenum tetraacetate identity and identifier reconciliation", "Mo-Mo bonding, acetate coordination, and evidence of structural integrity", "Sample assay, impurities, residual solvents, and grade", "Physical properties and changes under specified environmental conditions", "Substance-specific handling evidence and suitability for chemical use" ], "out_of_scope": [ "Manufacturing procedures and reaction apparatus", "Supplier products, packaging, pricing, and inventory management", "Other molybdenum oxidation states, oxides, and acetate complexes", "Distinct ligand-substituted derivatives, coordination adducts, and double salts", "Complete formulations, catalytic systems, and downstream materials containing the compound" ], "distinguishing_features": [ "Confirm the dinuclear formula Mo2(O2CCH3)4 rather than treating the empirical formula Mo(OAc)2 as proof of a monomer; the supplier identifies this substance as dimolybdenum tetraacetate. [Supplier identity record](https://www.sigmaaldrich.com/US/en/product/aldrich/232076)", "Require structural evidence compatible with two molybdenum centers joined by a quadruple bond and surrounded by four bridging acetates. [Tetra(acetato)dimolybdenum(II)](https://girolami-group.chemistry.illinois.edu/publications/publications/Inorg.%20Synth.%202014,%2036,%2078.pdf)", "Verify molybdenum as the metal rather than accepting the similar dimetal tetraacetate architecture as sufficient identification.", "Check whether additional ligands, counterions, or lattice components make the specimen a distinct adduct or double salt rather than the parent substance.", "Reconcile CAS 14221-06-8 and EC 238-089-5 with the actual formula and specimen description; identifiers alone do not establish sample purity. [Supplier identifiers](https://www.sigmaaldrich.com/US/en/product/aldrich/232076)" ], "characteristics": [ { "name": "Molecular identity", "kind": "category", "unit_or_values": "Mo2(O2CCH3)4; C8H12Mo2O8", "why_it_matters": "Preserves the dinuclear counting unit for identification and stoichiometry." }, { "name": "Formal molybdenum oxidation state", "kind": "category", "unit_or_values": "+II for each Mo in the neutral parent compound", "why_it_matters": "Distinguishes the parent from oxidized or mixed-valence material." }, { "name": "Mo-Mo structural integrity", "kind": "state", "unit_or_values": "Supported intact core; altered core; unresolved, with analytical evidence", "why_it_matters": "The intended chemistry may depend on retention of the bonded metal pair." }, { "name": "Mo-Mo distance", "kind": "measurement", "unit_or_values": "Å, with uncertainty, temperature, and specimen structure", "why_it_matters": "Provides structural evidence without treating one literature distance as a universal acceptance limit." }, { "name": "Assay and impurity profile", "kind": "measurement", "unit_or_values": "Mass % or mol %, with method, basis, and identified impurities", "why_it_matters": "Controls usable quantity and exposes contamination that can affect subsequent chemistry." }, { "name": "Residual water and solvent", "kind": "measurement", "unit_or_values": "Mass % or mg/kg, with analytical method", "why_it_matters": "Separates nominal compound mass from solvent content and flags possible coordination changes." }, { "name": "Physical form and appearance", "kind": "state", "unit_or_values": "Powder, crystals, solution, or suspension; observed color and observation conditions", "why_it_matters": "Supports sample comparison and change detection without using appearance as definitive identification." }, { "name": "Solubility and solution identity", "kind": "measurement", "unit_or_values": "mol/L or g/L, with solvent, temperature, equilibration time, and dissolved-species evidence", "why_it_matters": "Distinguishes dissolution of the parent from reaction or formation of another species." }, { "name": "Thermal events", "kind": "measurement", "unit_or_values": "°C, with pressure, atmosphere, heating rate, method, and event assignment", "why_it_matters": "Prevents decomposition or sublimation from being recorded as melting or boiling." }, { "name": "Exposure and storage history", "kind": "state", "unit_or_values": "Temperature, atmosphere, moisture exposure, light exposure, duration, and observed changes", "why_it_matters": "Allows current sample condition to be judged against documented storage and stability evidence." }, { "name": "Hazard and regulatory evidence", "kind": "relation", "unit_or_values": "Applicable SDS and regulatory records, including jurisdiction, revision, classification, and scope", "why_it_matters": "Ties handling decisions to the actual substance or product and distinguishes missing data from absence of hazard." } ], "affordances": [ "Reconcile a label or database record with the dimolybdenum tetraacetate identity.", "Compare a sample's analytical evidence with a documented reference material.", "Calculate available parent-compound and molybdenum amounts using assay and an explicit counting basis.", "Assess whether storage exposure or analytical changes require sample requalification.", "Evaluate compatibility with a proposed solvent or ligand-exchange use using condition-specific evidence.", "Identify missing hazard or identity evidence that prevents a justified handling or use decision." ], "agent_conduct": { "may": [ "Identify molybdenum(II) acetate from labels, identifiers and analytical data.", "Record whether a sample has kept its stated identity, for its keeper.", "Report its documented hazards from the supplier's safety data sheet." ], "must_not": [ "Use or release a sample whose identity has not been checked after storage.", "Handle it outside a controlled laboratory setting.", "Dispose of it in drains or ordinary waste.", "Present literature claims about its bonding as measured data for a particular sample." ], "requires_human": [ "Decisions on disposal of a sample.", "Use of a sample outside its documented purpose." ] }, "ethics": { "considerations": [ "Honest sample records protect the research that relies on them.", "Laboratory staff deserve accurate hazard information." ], "affected_parties": [ "Laboratory staff", "Researchers using the results" ] }, "owners": { "steward": "The laboratory or organization that holds the sample.", "master_systems": [] }, "visual_identification": [ "Typically a yellow crystalline solid; colour change may indicate decomposition.", "Identity is confirmed by the label and analysis, not by colour alone." ], "failure_modes_and_hazards": [ "Sensitivity to air or moisture can degrade samples.", "Dust can irritate the eyes, skin and lungs.", "Degraded samples give misleading experimental results." ], "standards_and_regulation": [ "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations." ], "what_it_is_for": [ "Molybdenum(II) acetate is encountered in inorganic chemistry research as a compound illustrating a metal-metal quadruple bond.", "It is used as a starting material for preparing other dimolybdenum complexes and for studying metal-metal bonding and ligand substitution." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q6896941: molybdenum(II) acetate", "url": "https://www.wikidata.org/wiki/Q6896941", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Molybdenum(II) acetate", "url": "https://en.wikipedia.org/wiki/Molybdenum%28II%29_acetate", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "substance-identity", "name": "Substance identity", "description": "Establishes which chemical entity the registry entry denotes and where that identity ends.", "rationale": "The short name can obscure nuclearity and invite conflation with other molybdenum acetate materials.", "layers": [ { "id": "names-and-identifiers", "name": "Names and identifiers", "description": "Connects the registry name to chemically consistent external records.", "findings": [ { "id": "dimer-identity", "name": "Dimer identity", "description": "Record the parent as dimolybdenum tetraacetate, with synonyms and identifiers supported by the retrieved record.", "questions": [ { "text": "Does the record denote Mo2(O2CCH3)4, or does its name leave nuclearity unresolved?", "kind": "definition", "id": "dimer-identity-q01" }, { "text": "Which inspected records support the CAS, EC, and PubChem mappings, and is the PubChem identifier a CID or an SID?", "kind": "provenance", "id": "dimer-identity-q02" } ] } ] }, { "id": "parent-and-related-species", "name": "Parent and related species", "description": "Separates the parent substance from mixtures and chemically distinct derivatives.", "findings": [ { "id": "additional-components", "name": "Additional components", "description": "Determine whether water, solvent, salts, or extra ligands are contaminants, formulation components, or part of a distinct chemical entity.", "questions": [ { "text": "Are additional components unbound residues, lattice guests, or coordinated ligands?", "kind": "measurement", "id": "additional-components-q01" }, { "text": "Does the evidence require a related-species record instead of assigning the entire specimen to the parent compound?", "kind": "boundary", "id": "additional-components-q02" } ] } ] } ] }, { "id": "bonding-and-coordination", "name": "Bonding and coordination", "description": "Represents the metal pair and acetate arrangement needed to recognize the parent structure.", "rationale": "Elemental composition alone cannot establish the defining bonded dimolybdenum core.", "layers": [ { "id": "dimolybdenum-core", "name": "Dimolybdenum core", "description": "Captures evidence for metal identity, oxidation state, and metal-metal bonding.", "findings": [ { "id": "core-authentication", "name": "Core authentication", "description": "Record the basis for assigning an intact Mo(II)-Mo(II) core and its bonding interpretation.", "questions": [ { "text": "Which structural or spectroscopic observations support the bonded Mo2 core in this specimen?", "kind": "measurement", "id": "core-authentication-q01" }, { "text": "Is the +II oxidation-state assignment supported by composition and charge balance, and are conflicting observations present?", "kind": "definition", "id": "core-authentication-q02" } ] } ] }, { "id": "acetate-environment", "name": "Acetate environment", "description": "Examines the bridging acetate ligands and any changes to the coordination environment.", "findings": [ { "id": "ligand-connectivity", "name": "Ligand connectivity", "description": "Track evidence for four bridging acetates and distinguish axial association from replacement of the defining ligands.", "questions": [ { "text": "What evidence establishes acetate identity, count, and bridging coordination?", "kind": "measurement", "id": "ligand-connectivity-q01" }, { "text": "Does an observed extra ligand represent reversible association under the measurement conditions or an isolated derivative?", "kind": "boundary", "id": "ligand-connectivity-q02" } ] } ] } ] }, { "id": "sample-composition-and-quality", "name": "Sample composition and quality", "description": "Connects the nominal identity to the actual amount and condition of material available.", "rationale": "A reagent label does not establish the fraction of intact parent compound or the suitability of a particular batch.", "layers": [ { "id": "assay-and-residues", "name": "Assay and residues", "description": "Separates parent content from free acetate, residual solvents, and other molybdenum species.", "findings": [ { "id": "parent-content", "name": "Parent content", "description": "Record assay basis and impurity evidence without equating total molybdenum content with chemical purity.", "questions": [ { "text": "Does the reported assay quantify intact Mo2(OAc)4, total molybdenum, or another analytical quantity?", "kind": "measurement", "id": "parent-content-q01" }, { "text": "Which residual solvents, free acetic acid, salts, or alternative molybdenum species were tested for, and at what detection limits?", "kind": "measurement", "id": "parent-content-q02" } ] } ] }, { "id": "batch-fitness", "name": "Batch fitness", "description": "Relates batch evidence to quantity calculations and intended-use acceptance.", "findings": [ { "id": "usable-amount-and-grade", "name": "Usable amount and grade", "description": "Make grade and counting basis explicit when judging or allocating a sample.", "questions": [ { "text": "Is the requested amount expressed as moles of Mo2(OAc)4, moles of Mo atoms, or mass of supplied material?", "kind": "definition", "id": "usable-amount-and-grade-q01" }, { "text": "Which verified impurity limits and identity checks must this batch satisfy for the proposed use?", "kind": "action", "id": "usable-amount-and-grade-q02" } ] } ] } ] }, { "id": "physical-state-and-stability", "name": "Physical state and stability", "description": "Records condition-dependent properties and evidence that the parent persists during storage or measurement.", "rationale": "A physical-property value is useful only when the measured material remains chemically identified.", "layers": [ { "id": "phase-and-solvent-behavior", "name": "Phase and solvent behavior", "description": "Characterizes solid specimens and their behavior in a specified liquid medium.", "findings": [ { "id": "physical-property-context", "name": "Physical property context", "description": "Attach solvent, temperature, phase, and species verification to appearance and solubility observations.", "questions": [ { "text": "What solid form, color, and phase evidence describe the specimen before measurement?", "kind": "measurement", "id": "physical-property-context-q01" }, { "text": "In the specified solvent, is the measured concentration attributable to intact parent compound, an adduct, or reaction products?", "kind": "measurement", "id": "physical-property-context-q02" } ] } ] }, { "id": "thermal-and-environmental-change", "name": "Thermal and environmental change", "description": "Separates thermal transitions from chemical deterioration and assesses exposure history.", "findings": [ { "id": "persistence-under-conditions", "name": "Persistence under conditions", "description": "Record evidence for retention or loss of identity under the actual temperature, atmosphere, and exposure duration.", "questions": [ { "text": "Does a reported thermal event represent melting, sublimation, solvent loss, or decomposition, and how was it assigned?", "kind": "measurement", "id": "persistence-under-conditions-q01" }, { "text": "What changes after air, moisture, light, or temperature exposure would trigger reanalysis before use?", "kind": "action", "id": "persistence-under-conditions-q02" }, { "text": "Which source supports the storage conditions for this grade and container history?", "kind": "provenance", "id": "persistence-under-conditions-q03" } ] } ] } ] }, { "id": "chemical-use-and-handling", "name": "Chemical use and handling", "description": "Connects intended transformations and handling decisions to the verified substance and sample.", "rationale": "Neither generic molybdenum guidance nor a precursor's hazards automatically describe this acetate dimer.", "layers": [ { "id": "reaction-role-and-compatibility", "name": "Reaction role and compatibility", "description": "Defines what the parent must contribute to a proposed chemical operation.", "findings": [ { "id": "required-core-and-ligands", "name": "Required core and ligands", "description": "Distinguish uses requiring an intact dimolybdenum unit from uses requiring only a molybdenum source.", "questions": [ { "text": "Does the intended use require retention of the Mo2 core, exchange of acetate ligands, or conversion to another molybdenum material?", "kind": "action", "id": "required-core-and-ligands-q01" }, { "text": "Which experimentally supported compatibility evidence applies to the proposed solvent, reagents, and conditions?", "kind": "provenance", "id": "required-core-and-ligands-q02" } ] } ] }, { "id": "hazard-evidence-and-controls", "name": "Hazard evidence and controls", "description": "Resolves the scope and applicability of safety information before it guides action.", "findings": [ { "id": "applicable-safety-record", "name": "Applicable safety record", "description": "Record current substance or product safety evidence separately from hazards of synthesis precursors, solvents, and reaction products.", "questions": [ { "text": "Which current SDS supplies the applicable GHS classification and handling information for this material and jurisdiction?", "kind": "provenance", "id": "applicable-safety-record-q01" }, { "text": "Does a cited exposure limit explicitly cover this compound, a defined molybdenum-compound category, or only a different substance?", "kind": "boundary", "id": "applicable-safety-record-q02" }, { "text": "What documented controls and disposal route apply to the actual solid, solution, or contaminated residue being handled?", "kind": "action", "id": "applicable-safety-record-q03" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This is a recall-based description; no sources were consulted.", "CAS, EC and PubChem identifiers, GHS classification and exposure limits require verification.", "The bond length is approximate; thermal properties, solvent stability and storage requirements should be checked against primary measurements and a product-specific safety data sheet." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "Molecular formula", "value_or_pattern": "C8H12Mo2O8", "note": "Commonly written Mo2(OAc)4, where OAc denotes acetate." }, { "scheme": "Chemical nomenclature", "value_or_pattern": "Dimolybdenum tetraacetate", "note": "An alternative name that makes the dinuclear composition explicit." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Research precursor for other compounds containing multiply bonded molybdenum pairs.", "Model compound for studying metal-metal quadruple bonding and its electronic structure.", "Starting material for ligand-substitution studies involving bridging carboxylates." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Molar mass", "typical_range": "Approximately 428.07", "unit": "g/mol" }, { "quantity": "Mo-Mo bond length", "typical_range": "Approximately 2.09 in the crystalline compound", "unit": "Å" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Oxidation can change the molybdenum oxidation states and disrupt the characteristic metal-metal bonding.", "Ligand exchange can change the compound's identity during reactions or handling in coordinating media." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "Acetate", "difference": "Acetate is the carboxylate anion serving as a ligand; molybdenum(II) acetate is the complete dinuclear metal complex." }, { "name": "Other dimolybdenum tetracarboxylates", "difference": "They have different substituents on the bridging carboxylate ligands; the acetate compound specifically contains CH3COO groups." }, { "name": "Molybdenum(VI) oxide", "difference": "MoO3 is an oxide containing formally Mo(VI), rather than an acetate complex containing a quadruple-bonded Mo(II) pair." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of molybdenum(II) acetate this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which PubChem CID represents the parent dimer, and how should it be reconciled with supplier SID 24853876 and connectivity representations that omit metal-metal bonding?", "What experimentally supported air, moisture, and light stability limits apply to different grades, and how do these relate to supplier storage recommendations?", "Which reliable measurements establish melting, sublimation, decomposition, or boiling behavior, with pressure and atmosphere specified?", "Which solvents preserve the parent dimer, and what quantitative solubility and solution-speciation data support that conclusion?", "What current jurisdiction-specific GHS classifications, applicable exposure limits, and disposal requirements are supported by inspected safety and regulatory records?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 16, "questions": 28 } }