8.14874

2-Methyl-2-butene

(mixture of isomers) for synthesis

• Synonym(s): 2-Methyl-2-butene, Isoamylene, Trimethylethylene
• Empirical Formula (Hill Notation): C₅H₁₀
• CAS Number: 26760-64-5
• Molecular Weight: 70.13
• UNSPSC Code: 12352002
• EC Index Number: 247-975-0
• NACRES: NA.22

Properties

• vapor pressure: 513 hPa ( 20 °C)
• Quality Level: 200
• Assay: 83.0-88.0% (GC)
• form: liquid
• autoignition temp.: 290 °C
• potency: 1000-1700 mg/kg LD₅₀, oral (Rat); >2000 mg/kg LD₅₀, skin (Rat)
• expl. lim.: 1-9 % (v/v)
• kinematic viscosity: 0.29 cSt(20 °C)
• mp: -134 °C
• transition temp: flash point -45 °C
• density: 0.66 g/cm³ at 20 °C
• storage temp.: 2-8°C
• InChI: 1S/C5H10/c1-4-5(2)3/h2,4H2,1,3H3
• InChI key: MHNNAWXXUZQSNM-UHFFFAOYSA-N

Description

Application

• Palladium-Catalyzed Pentenylation of Indoles: A study demonstrated the use of 2-Methyl-2-butene in palladium-catalyzed intermolecular dehydrogenative pentenylation of indoles, offering a novel pathway in synthetic chemistry for creating complex molecules (Zhang et al., 2024).
• Asynchronous Concerted Mechanism: Research explored an asynchronous concerted mechanism in Lewis acid-mediated carbonyl-olefin [2+2] cycloaddition involving 2-Methyl-2-butene, providing insights into reaction dynamics and stereochemical outcomes in organic synthesis (Li et al., 2023).

Analysis Note

Assay (GC, area%): 83.0 - 88.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.658 - 0.663
2-Methyl-1-buten (GC, area%): 12.0 - 17.0 % (a/a)
Identity (IR): passes test

Safety Information

• Pictograms: GHS02,GHS07,GHS08,GHS09
• Signal Word: Danger
• Hazard Statements: H224 - H302 - H304 - H315 - H336 - H341 - H351 - H411
• Precautionary Statements: P210 - P233 - P273 - P301 + P310 - P331 - P403 + P233
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 2 - Asp. Tox. 1 - Carc. 2 - Flam. Liq. 1 - Muta. 2 - Skin Irrit. 2 - STOT SE 3
• Target Organs: Central nervous system
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 2
• Flash Point(F): -49.0 °F
• Flash Point(C): -45 °C