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(E)-But-2-en
TRANS-2-BUTENE · TR-2-BUTENE · (E)-2-Butene · (E)-2-C4H8 · t-butene-2 · 2-BUTYLENE · trans-Butene · 2-Butene,(E)-
Identifikatoren & physikalische Daten
| CAS No. | 107-01-7 |
|---|---|
| Summenformel | C4H8 |
| Durchschnittliche Molmasse | 56,11 g/mol |
| Monoisotopische Masse | 56,06260026 g/mol |
| SMILES | C/C=C/C |
| InChIKey | IAQRGUVFOMOMEM-ONEGZZNKSA-N |
| PubChem CID | 62695 |
| ChEBI | CHEBI:48363 |
| EC No. | 203-452-9 |
| DTXSID | DTXSID7027255 |
| Lokaler Name | (E)-But-2-en |
Chemische & physikalische Eigenschaften
| XLogP | 2,3 |
|---|---|
| Polarare Oberfläche (TPSA) | 0 |
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 0 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 4 |
| Formalladung | 0 |
| Komplexität | 15,2 |
| Stoffklassen | Flammable agents - 4th degree |
| SpringerMaterials Properties | Schoenflies notation |
| LogP (Verteilungskoeffizient) | log Kow = 1.85 (mixture of 70% cis- and 30% trans-2-Butene)log Kow = 2.31 |
| Geruch | Slightly aromatic odor |
| Dichte | 0.6042 g/cu cm at 20/4 °CDensity of liquid: 10.69 mol/l @ 25 °Ccritical volume 0.238 l/molDensity (at the boiling point of the liquid): 0.6 kg/l0.599 @25 °C0.5990 |
| Viscosity | 0.00763 mPa |
| Color/Form | Colorless gasFlammable gas |
| Löslichkeit | Very soluble in ethanol and ether. Soluble in benzene. /cis- and trans-2-Butene/Solubility in water, 511 mg/L at 25 °CInsoluble in waterSoluble in organic solventsSoluble in benzeneSolubility in water, mg/l at 25 °C: 511 (very slightly soluble) |
| Flammpunkt | -19.99 °C (-3.98 °F) - closed cupFlammable gas<−30 °F |
| Siedepunkt | 3.73 °C at 760 mm Hg /cis-2-Butene/0.88 °C0.9 °C0.8 °C @760 [mm Hg]1 °C(lit.) |
| Decomposition | When heated to decomposition it emits acrid smoke and irritating vapors.Hazardous decomposition products formed under fire conditions: Carbon oxidesWhen heated to decomposition it emits acrid smoke and fumes. |
| Schmelzpunkt | -139.3 °C /cis-2-Butene/-105.52 °C-105.5 °C−140 °C(lit.) |
| Dampfdichte | 2 (vs air) |
| Dampfdruck | 2575 mm Hg ( 37.7 °C) |
| Brechungsindex | 1.3932 |
| Explosionsgrenze | 9.7% |
| Merck | 1520 |
| BRN | 1718756 |
| Henry-Konstante | 3.9×10-5 mol/(m3Pa) at 25℃, Irmann (1965) |
| Stabilität | Stable. Incompatible with strong oxidizing agents, peroxides, peroxyacids, aluminium tetrahydroborate. Extremely flammable. |
| InChI | InChI=1S/C4H8/c1-3-4-2/h3-4H,1-2H3/b4-3+ |
| InChIKey | IAQRGUVFOMOMEM-ONEGZZNKSA-N |
| SMILES | C/C=C/C |
| CAS Datenbank | 624-64-6(CAS DataBase Reference) |
| EPA chemische Informationen | trans-2-Butene (624-64-6) |
Sicherheit & Vorschriften
| GHS-Einstufung | DangerH220: Extremely flammable gas [Danger Flammable gases]P203, P210, P222, P280, P377, P381, and P403 (click each P-code to see the statement)H220 (100%): Extremely flammable gas [Danger Flammable gases]P203, P210, P222, P280, P377, P381, P403, and P410+P403 (click each P-code to see the statement) |
|---|---|
| Regulatorische Informationen | Chemical: 2-ButeneChemical: 2-Butene, (E)-2-Butene, (2E)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2-Butene, (2E)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 10-07-2020 https://echa.europa.eu/registration-dossier/-/registered-dossier/133462-Butene: HSNO Approval: HSR005566 Approved with controlstrans-2-Butene: HSNO Approval: HSR005568 Approved with controls |
| Weitere Sicherheitsinformationen | IMAP assessments - 2-Butene, (E)-: Human health tier I assessmentIMAP assessments - 2-Butene: Human health tier I assessment |
| DOT-Kennzeichnung | Flammable Gas |
| Brandgefahren | Excerpt from ERG Guide 115 [Gases - Flammable (Including Refrigerated Liquids)]:Extremely flammable. Gas/air mixtures are explosive. |
| Brandpotenzial | Flammable gas. |
| Gesundheitsgefahren | Excerpt from ERG Guide 115 [Gases - Flammable (Including Refrigerated Liquids)]: |
| Reaktive Gruppe | Hydrocarbons, Aliphatic Unsaturated |
| EG-Einstufung | H220H280 |
| UN-Einstufung | UN Hazard Class: 2.1 |
| Reactivity Alerts | Highly Flammable |
| Reactivity Profile | The unsaturated aliphatic hydrocarbons, such as 2-BUTENE, are generally much more reactive than the alkanes. Strong oxidizers may react vigorously with them. Reducing agents can react exothermically to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions. Aluminum borohydride reacts with alkenes and in the presence of oxygen, combustion is initiated even in the absence of moisture. |
Anwendungen & Verwendung
Verwenden
trans-2-Butene can be used as a monomer unit to produce high molecular weight polyolefins with well-defined microstructures by nickle-catalyzed polymerization reaction. It is also used as a reactant in the isomerization reaction to produce the corresponding isomer using acid-activated catalysts.