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8.14874

Sigma-Aldrich

2-Methyl-2-butene

(mixture of isomers) for synthesis

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Synonym(s):
2-Methyl-2-butene, Isoamylene, Trimethylethylene
Empirical Formula (Hill Notation):
C5H10
CAS Number:
Molecular Weight:
70.13
EC Index Number:
247-975-0

vapor pressure

513 hPa ( 20 °C)

Quality Level

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

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This Item
8.41089M32704379263
2-Methyl-2-butene (mixture of isomers) for synthesis

8.14874

2-Methyl-2-butene

2-Methyl-3-buten-2-ol for synthesis

8.41089

2-Methyl-3-buten-2-ol

2-Methyl-2-butene ≥99%, purified by redistillation

M32704

2-Methyl-2-butene

2-Methyl-2-butene technical grade, 90%

379263

2-Methyl-2-butene

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

100

storage temp.

2-8°C

storage temp.

2-30°C

storage temp.

-

storage temp.

-

density

0.66 g/cm3 at 20 °C

density

0.824 g/cm3 at 20 °C

density

0.662 g/mL at 25 °C (lit.)

density

0.662 g/mL at 25 °C (lit.)

form

liquid

form

liquid

form

-

form

liquid

mp

-134 °C

mp

-28 °C

mp

−134 °C (lit.)

mp

−134 °C (lit.)

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

signalword

Danger

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

3 - Flammable liquids

wgk_germany

WGK 2

flash_point_f

-49.0 °F

flash_point_c

-45 °C


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