295469
2-Methylpropene
99%
Synonym(s):
Isobutylene
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About This Item
Linear Formula:
(CH3)2C=CH2
CAS Number:
Molecular Weight:
56.11
UNSPSC Code:
12142100
NACRES:
NA.22
PubChem Substance ID:
EC Number:
204-066-3
Beilstein/REAXYS Number:
773645
MDL number:
Assay:
99%
InChI key
VQTUBCCKSQIDNK-UHFFFAOYSA-N
InChI
1S/C4H8/c1-4(2)3/h1H2,2-3H3
SMILES string
CC(C)=C
vapor density
2 (vs air)
vapor pressure
3278 mmHg ( 37.7 °C)
assay
99%
autoignition temp.
869 °F
bp
−6.9 °C (lit.)
mp
−140 °C
Quality Level
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Application
2-Methylpropene can be used in the following reactions:
- Asymmetric synthesis of S-(+)-2,2-dimethylcyclopropane carboxylic acid, a key building block for the synthesis of cilastatin.
- Alkylation of p-xylene to form t-butyl-p-xylene catalyzed by a heteropolyacid.
- Synthesis of poly(2-methylpropene) or polyisobutene.
General description
2-methylpropene is used to synthesize S-(+)-2,2-Dimethylcyclopropane carboxylic acid via asymmetric cyclopropanation reaction.
Packaging
Supplied in a Sure/Pac™ cylinder and has a brass needle valve with a male 1/4" NPTF outlet thread installed. Before using the cylinder, ensure that the valve is closed, then remove the galvanized steel hex cap that seals the outlet valve.
Compatible with the following:
Compatible with the following:
Legal Information
Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
Sure/Pac is a trademark of Sigma-Aldrich Co. LLC
signalword
Danger
hcodes
pcodes
Hazard Classifications
Flam. Gas 1 - Press. Gas Liquefied gas
Storage Class
2A - Gases
wgk
nwg
flash_point_f
-112.0 °F - closed cup
flash_point_c
-80 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves
Regulatory Information
监管及禁止进口产品
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Selective alkylation of p-xylene with 2-methylpropene by 12-tungstophosphoric acid.
Soeda H, et al.
Chemistry Letters (Jpn), 23(5), 909-912 (1994)
The synthesis of S-(+)-2, 2-dimethylcyclopropane carboxylic acid: a precursor for cilastatin.
Wang Q, et al.
Tetrahedron Asymmetry, 9(22), 3971-3977 (1998)
Molybdenum (III) Compounds as Catalysts for 2?Methylpropene Polymerization.
Hijazi A K, et al.
Angewandte Chemie (International Edition in English), 46(38), 7290-7292 (2007)
The synthesis of S-(+)-2, 2-dimethylcyclopropane carboxylic acid: a precursor for cilastatin
Wang Q, et al.
Tetrahedron Asymmetry, 9, 3971-3977 (1998)
Hongfu Yuan et al.
Applied spectroscopy, 61(1), 96-101 (2007-02-22)
The molar ratio between methanol and isobutylene (MRMI) is very important to the operation of methyl tertiary butyl ether (MTBE) production units. A new on-line near-infrared (NIR) analytical system was integrated for monitoring the MRMI in real time and was
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