145491

2,3-Dimethyl-1,3-butadiene

98%, contains 100 ppm BHT as stabilizer

• Sinonimo/i: 2,3-Dimethylbuta-1,2-diene, 2,3-Dimethylenebutane, Biisopropenyl, Diisopropenyl
• Formula condensata: CH₂=C(CH₃)C(CH₃)=CH₂
• Numero CAS: 513-81-5
• Peso molecolare: 82.14
• Beilstein: 605285
• Numero CE: 208-172-0
• Numero MDL: MFCD00008595
• Codice UNSPSC: 12352100
• ID PubChem: 24848729
• NACRES: NA.22

Proprietà

• Tensione di vapore: 269 mmHg ( 37.7 °C)
• Livello qualitativo: 200
• Saggio: 98%
• Forma fisica: liquid
• contiene: 100 ppm BHT as stabilizer
• Indice di rifrazione: n20/D 1.438 (lit.)
• P. eboll.: 68-69 °C (lit.)
• Punto di fusione: −76 °C (lit.)
• Densità: 0.726 g/mL at 25 °C (lit.)
• Temperatura di conservazione: 2-8°C
• Stringa SMILE: CC(=C)C(C)=C
• InChI: 1S/C6H10/c1-5(2)6(3)4/h1,3H2,2,4H3; SDJHPPZKZZWAKF-UHFFFAOYSA-N

Descrizione

Descrizione generale

2,3-Dimethyl-1,3-butadiene (DMBD) is a conjugated diene. It undergoes Diels Alder cycloaddition reaction with 2-thio-3-chloroacrylamides under thermal, catalytic and microwave conditions. It undergoes thermal [4+2] cycloaddition reaction with 3-acetyl-, 3-carbamoyl and 3-ethoxycarbonylcoumarins under solvent free conditions. DMBD participates in polymerization reactions in the presence of iron dichloride complexes based catalysts.

Applicazioni

2,3-Dimethyl-1,3-butadiene was used to investigate the reactions of 1,3-dienes with the Si(001) surface using scanning tunneling microscopy and fourier transform infrared spectroscopy.
It may be used in the following processes:

• Preparation of 1,3,6-triene derivatives of corresponding 1-aryl-substituted 1,3-dienes by 1,4-hydrobutadienylation in the presence of cobalt catalyst.
• Synthesis of 6-aryl(hetaryl)-3,4-dimethyl-1-nitro-1-cyano-3-cyclohexenes by reacting with gem-cyanonitroethenes.
• As a halogen trap during the study of the photolysis reaction of dibromo adduct of 2,5-diphenyltellurophene.

Informazioni sulla sicurezza

• Pittogrammi: GHS02
• Avvertenze: Danger
• Indicazioni di pericolo: H225
• Consigli di prudenza: P210 - P233 - P240 - P241 - P242 - P243
• Classi di pericolo: Flam. Liq. 2
• Codice della classe di stoccaggio: 3 - Flammable liquids
• Classe di pericolosità dell'acqua (WGK): WGK 3
• Punto d’infiammabilità (°F): 30.2 °F - closed cup
• Punto d’infiammabilità (°C): -1 °C - closed cup
• Dispositivi di protezione individuale: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter