{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.molybdenum-ii-bromide","code":"thing-q4096882","url":"https://ver.cy/models/thing/q4096882/","name":"molybdenum(II) bromide","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Molybdenum(II) bromide is a binary inorganic bromide with empirical formula MoBr2, in which molybdenum has the formal oxidation state +2; the solid involves metal clusters rather than discrete MoBr2 molecules.","purpose":"Enable an agent to identify molybdenum(II) bromide, assess a specimen's composition and condition, and determine whether evidence supports its intended handling or use.","scope":{"in":["Empirical MoBr2 composition and formal molybdenum oxidation state +II","Distinction between empirical formula, cluster formula, and crystallographic structure","Specimen hydration, impurities, phase composition, and analytical identity","Physical properties and chemical changes under recorded conditions","Substance-specific identifiers, hazard evidence, and suitability constraints"],"out":["Other molybdenum bromides with different oxidation states","Independent models of hydrated or ligand-substituted derivatives unless registry scope explicitly includes them","Complete synthesis procedures and manufacturing equipment","Commercial formulations and packaging as products","General molybdenum toxicology without evidence of applicability to this substance"],"boundaries":[]},"distinguishingFeatures":["Require evidence consistent with a Mo:Br atomic ratio of 1:2; bulk elemental ratio alone cannot exclude a mixture.","Distinguish formal Mo(II) identity from Mo(III), Mo(IV), or mixed-valence bromide material using composition and suitable structural or spectroscopic evidence.","Resolve whether MoBr2 denotes empirical composition and Mo6Br12 denotes a cluster-based description; do not infer discrete MoBr2 molecules from the empirical formula.","Check explicitly for water, additional ligands, oxygen substitution, and counterions before treating a reported cluster compound as the binary bromide.","Use phase or structural evidence to distinguish the target from mixtures of molybdenum metal and higher bromides."],"structure":{"bundles":[{"id":"chemical-identity","name":"Chemical identity","description":"Resolve what the name molybdenum(II) bromide identifies.","layers":[{"id":"composition-and-valence","name":"Composition and valence","description":"Establish the binary composition and formal oxidation-state assignment.","findings":[{"id":"dibromide-identity-test","name":"Dibromide identity test","description":"Recognition requires evidence compatible with MoBr2 and formal Mo(II), without treating elemental stoichiometry as proof of phase purity.","questions":[{"text":"What evidence establishes the Mo:Br ratio and supports the formal Mo(II) assignment?","id":"dibromide-identity-test-q01","kind":"measurement"},{"text":"Could molybdenum metal and higher bromides reproduce the measured bulk composition?","id":"dibromide-identity-test-q02","kind":"boundary"}]}]},{"id":"names-and-identifiers","name":"Names and identifiers","description":"Bind external records to the precise substance form.","findings":[{"id":"identifier-form-match","name":"Identifier-to-form match","description":"Identifiers require verification against formula and hydration state before use.","questions":[{"text":"Which authoritative records establish the CAS number, PubChem CID, and EC number, if assigned?","id":"identifier-form-match-q01","kind":"provenance"},{"text":"Does each record identify the binary bromide, a hydrate, or a broader commercial material?","id":"identifier-form-match-q02","kind":"boundary"}]}]}]},{"id":"cluster-structure-and-form","name":"Cluster structure and form","description":"Represent structural evidence without confusing binary bromide and hydrated cluster compounds.","layers":[{"id":"formula-to-structure","name":"Formula to structure","description":"Separate composition notation from experimentally established atomic arrangements.","findings":[{"id":"cluster-evidence","name":"Cluster evidence","description":"Structural literature explicitly characterizes Mo6Br12·2H2O; its hydration state must accompany any structural claim drawn from it. [Primary structural study](https://pubs.acs.org/doi/10.1021/ic50080a001).","questions":[{"text":"Which structural reference supports the Mo6Br12 description for the specimen's actual form?","id":"cluster-evidence-q01","kind":"provenance"},{"text":"Which Mo-Mo and Mo-Br connectivity features are experimentally established for that form?","id":"cluster-evidence-q02","kind":"definition"}]}]},{"id":"hydration-and-derivatives","name":"Hydration and derivatives","description":"Locate the boundary between specimen condition and a distinct chemical identity.","findings":[{"id":"water-and-ligand-boundary","name":"Water and ligand boundary","description":"Record detected water and ligands without assuming they are surface contamination or part of the target structure.","questions":[{"text":"Is detected water adsorbed, lattice-associated, coordinated, or unresolved?","id":"water-and-ligand-boundary-q01","kind":"measurement"},{"text":"Does the observed composition remain within this registry entry or require a relation to a separate derivative?","id":"water-and-ligand-boundary-q02","kind":"boundary"}]}]}]},{"id":"specimen-quality","name":"Specimen quality","description":"Establish whether a particular specimen represents the target substance adequately.","layers":[{"id":"assay-and-impurities","name":"Assay and impurities","description":"Separate target content from elemental totals and interfering species.","findings":[{"id":"purity-evidence","name":"Purity evidence","description":"Assay results must specify their basis and the impurities they can detect.","questions":[{"text":"What assay quantifies the target, and is its result expressed on an as-received or dry basis?","id":"purity-evidence-q01","kind":"measurement"},{"text":"What limits are established for other molybdenum bromides, metallic molybdenum, oxygen-containing phases, and residual reagents?","id":"purity-evidence-q02","kind":"measurement"}]}]},{"id":"phase-recognition","name":"Phase recognition","description":"Connect analytical signatures to form-specific reference evidence.","findings":[{"id":"reference-pattern-agreement","name":"Reference-pattern agreement","description":"Phase identification should record matching features, unmatched features, and detection limits.","questions":[{"text":"Does diffraction or another validated method support the assigned bromide form?","id":"reference-pattern-agreement-q01","kind":"measurement"},{"text":"Which unexplained signals prevent accepting the specimen for its intended use?","id":"reference-pattern-agreement-q02","kind":"action"}]}]}]},{"id":"properties-and-transformations","name":"Properties and transformations","description":"Track condition-dependent properties and changes in chemical identity.","layers":[{"id":"thermal-and-physical-behavior","name":"Thermal and physical behavior","description":"Attach physical measurements to characterized material and test conditions.","findings":[{"id":"qualified-property-values","name":"Qualified property values","description":"Density and thermal constants remain unresolved until their specimen form, conditions, and event assignment are supported.","questions":[{"text":"Which density and thermal measurements are available for verified binary molybdenum(II) bromide?","id":"qualified-property-values-q01","kind":"provenance"},{"text":"Does an observed thermal event represent melting, water loss, decomposition, or another transformation?","id":"qualified-property-values-q02","kind":"measurement"}]}]},{"id":"environmental-and-solvent-response","name":"Environmental and solvent response","description":"Assess whether exposure preserves the original substance.","findings":[{"id":"identity-after-exposure","name":"Identity after exposure","description":"Distinguish physical dissolution from changes in oxidation state, hydration, or ligand coordination.","questions":[{"text":"What evidence establishes the products or retained identity after air, moisture, or solvent exposure?","id":"identity-after-exposure-q01","kind":"measurement"},{"text":"Which exposure conditions require recharacterization before further use?","id":"identity-after-exposure-q02","kind":"action"}]}]}]},{"id":"use-and-handling-decisions","name":"Use and handling decisions","description":"Translate verified identity and condition into justified operational choices.","layers":[{"id":"precursor-suitability","name":"Precursor suitability","description":"Check material requirements and formula-unit conventions before use.","findings":[{"id":"form-specific-use-match","name":"Form-specific use match","description":"An intended transformation must specify acceptable hydration, purity, and whether quantities refer to Mo atoms, empirical units, or cluster units.","questions":[{"text":"Does the intended use require binary Mo6Br12, a hydrated form, or another explicitly identified precursor?","id":"form-specific-use-match-q01","kind":"action"},{"text":"What formula and assay basis govern molar quantities and molybdenum equivalents?","id":"form-specific-use-match-q02","kind":"measurement"}]}]},{"id":"hazard-and-storage-evidence","name":"Hazard and storage evidence","description":"Resolve applicable precautions from evidence tied to the specimen's identity.","findings":[{"id":"applicable-safety-record","name":"Applicable safety record","description":"Hazard classifications, exposure limits, storage conditions, and disposal requirements need explicit identity and jurisdiction matches; missing data is unresolved.","questions":[{"text":"Which current safety and regulatory sources apply to this exact chemical form and distinguish substance-specific limits from broader molybdenum limits?","id":"applicable-safety-record-q01","kind":"provenance"},{"text":"What verified precautions govern containment, atmosphere, incompatible contacts, and disposal for the intended operation?","id":"applicable-safety-record-q02","kind":"action"}]}]}]},{"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.","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.","questions":[{"text":"Which of these check these first hold for the sense of molybdenum(II) bromide this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of molybdenum(II) bromide this model covers, and on what evidence?","id":"evidence-identifiers-q01","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.","questions":[{"text":"Which of these real-world use hold for the sense of molybdenum(II) bromide this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of molybdenum(II) bromide this model covers, and on what evidence?","id":"evidence-measurements-q01","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.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of molybdenum(II) bromide this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe its cluster structure and its role in molybdenum halide chemistry.","Report the hazards listed in its safety data sheet to the user."],"mustNot":["Describe it as a simple molecular MoBr2 compound when the solid is cluster-based.","Handle it without the protective equipment its safety data sheet requires.","Dispose of metal halide waste with ordinary rubbish or into drains."],"requiresHuman":["Approving its use or disposal in a laboratory."]},"ethics":{"considerations":["Accurate structural records prevent errors that propagate through materials research."],"affectedParties":["Laboratory staff","Researchers relying on the record"]},"owners":{"steward":"The laboratory that holds it; the supplier answers for its identity and grade.","roles":[],"masterSystems":[]},"relations":[{"target":"Q11173","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.molybdenum-ii-bromide","Wikidata: Q4096882 (https://www.wikidata.org/wiki/Q4096882)"]},"properties":{"applicability":"required","items":["Formula and reporting basis: Empirical MoBr2; cluster-based Mo6Br12 where supported; explicit hydrate or adduct formula","Bromine-to-molybdenum atomic ratio: mol Br/mol Mo; nominally 2 for the binary target, with uncertainty","Molybdenum oxidation-state assignment: Formal +II target; supported, inconsistent, or unresolved","Cluster and lattice assignment: Specimen linked to an experimentally supported structural reference","Water and additional ligand content: Mass fraction or mol per explicitly stated formula unit; method and detection limit","Assay and phase purity: Mass % and phase fraction %, each with method and uncertainty","Physical form and exposure condition: Observed phase and morphology; temperature in K, pressure in Pa, atmosphere, and exposure duration","Thermal event: K or °C; melting, dehydration, decomposition, sublimation, or unresolved event; atmosphere and method","Regulatory identity and hazard evidence: Verified CAS, PubChem, or EC record and applicable safety source, with form, jurisdiction, and date"]},"recognition":{"applicability":"required","items":["A coloured crystalline solid; its identity is settled by analysis and label, not appearance."]},"capabilities":{"applicability":"required","items":["Reconcile a specimen label with analytical evidence and the registry identity.","Normalize quantity calculations to an explicit empirical, cluster, or hydrate formula basis.","Select identity and purity checks that distinguish higher bromides, hydrates, and mixed phases.","Assess whether storage or exposure history warrants recharacterization.","Screen suitability as a molybdenum bromide or cluster precursor using verified form and assay.","Retrieve applicable handling and disposal requirements from verified substance-specific records."]},"hazards":{"applicability":"required","items":["Irritating to skin, eyes and airways as a dust.","May react with moisture or oxidants and degrade in storage."]},"interfaces":{"applicability":"required","items":["Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations."]},"context":{"applicability":"required","items":["Molybdenum(II) bromide is encountered principally in specialist inorganic chemistry research.","Its clustered solid structure makes it relevant to studies of molybdenum halides, metal-metal bonding and related cluster compounds."]}},"sources":[{"title":"Wikidata item Q4096882: molybdenum(II) bromide","url":"https://www.wikidata.org/wiki/Q4096882","note":"identity and sense of the item"},{"title":"Wikipedia: Molybdenum(II) bromide","url":"https://en.wikipedia.org/wiki/Molybdenum%28II%29_bromide","note":"general description of the item"}],"openQuestions":["Which verified CAS, PubChem, and EC records identify the binary bromide, and how do they separate hydrated forms?","What primary structural evidence establishes the anhydrous form and its relationship to reported hydrated Mo6Br12 compounds?","Which measured density, melting, boiling, sublimation, or decomposition data are reliable and form-specific?","How do air, moisture, and representative solvents affect identity over relevant temperatures and exposure times?","Which substance-specific hazard classifications, exposure limits, and storage requirements are supported by current authoritative evidence?"],"resources":{"spec":"/models/things/publications/thing-q4096882/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q4096882/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:22:26Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:30+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}