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Key Documents

110930

Sigma-Aldrich

3-Methyl-1,2-butadiene

97%

Synonym(s):

1,1-Dimethylallene

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About This Item

Linear Formula:
(CH3)2C=C=CH2
CAS Number:
Molecular Weight:
68.12
Beilstein:
1697090
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22

vapor pressure

6.87 psi ( 20 °C)

Quality Level

Assay

97%

refractive index

n20/D 1.419 (lit.)

bp

40-41 °C (lit.)

mp

−148 °C (lit.)

density

0.694 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

CC(C)=C=C

InChI

1S/C5H8/c1-4-5(2)3/h1H2,2-3H3

InChI key

PAKGDPSCXSUALC-UHFFFAOYSA-N

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Application

3-Methyl-1,2-butadiene (1,1-dimethylallene) has been used to study the photo-induced reaction of 1,1-dimethylallene with the cyanoarenes 1,2,4,5-tetracyanobenzene, 1,4-dicyanobenzene and 1,4-dicyanonaphthalene in the presence of methanol as nucleophile.

Signal Word

Danger

Hazard Statements

Hazard Classifications

Asp. Tox. 1 - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

10.4 °F - closed cup

Flash Point(C)

-12 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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The electron transfer photochemistry of allenes with cyanoarenes. Photochemical nucleophile?olefin combination, aromatic substitution (photo-NOCAS) and related reactions.
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J. Chem. Soc. Perkin Trans. II, 1, 48-60 (2001)
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Accessing enantiomerically enriched amines often demands oxidation-state adjustments, protection and deprotection processes, and purification procedures that increase cost and waste, limiting applicability. When diastereomers can be formed, one isomer is attainable. Here, we show that nitriles, largely viewed as insufficiently

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