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220159

Sigma-Aldrich

2,3-Dimethyl-2-butene

≥99%

Synonym(s):

Tetramethylethylene

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$190.00
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$671.00

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25 ML
$190.00
100 ML
$671.00

About This Item

Linear Formula:
(CH3)2C=C(CH3)2
CAS Number:
563-79-1
Molecular Weight:
84.16
Beilstein/REAXYS Number:
1361357
EC Number:
209-263-8
MDL number:
MFCD00008897
UNSPSC Code:
12352100
PubChem Substance ID:
24853167
NACRES:
NA.22

$190.00

Available to ship onMay 02, 2025Details

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vapor pressure

215 mmHg ( 37.7 °C)

assay

≥99%

form

liquid

autoignition temp.

754 °F

refractive index

n20/D 1.412 (lit.)

bp

73 °C (lit.)

mp

−75 °C (lit.)

density

0.708 g/mL at 25 °C (lit.)

storage temp.

2-8°C

SMILES string

C\C(C)=C(\C)C

InChI

1S/C6H12/c1-5(2)6(3)4/h1-4H3

InChI key

WGLLSSPDPJPLOR-UHFFFAOYSA-N

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General description

2,3-Dimethyl-2-butene undergoes ozonolysis in dark to yield hydroxyl radical[1]. Reaction of ozone with 2,3-dimethyl 2-butene (DMB) has been investigated using a flow-tube interfaced to UV photoelectron spectrometer[2]. DMB forms adduct with thianthrene cation radical tetrafluoroborate at 0°C and -15°C[3].

Application

2,3-Dimethyl-2-butene was employed as substrate in photoinduced molecular transformations involving 2-hydroxy-1,4-naphthoquinones[4].

accessory

Product No.
Description
Pricing

pictograms

FlameHealth hazard
GHS02,GHS08

signalword

Danger

hcodes

H225,H304

Hazard Classifications

Asp. Tox. 1 - Flam. Liq. 2

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

17.6 °F - closed cup

flash_point_c

-8 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
SHBR8100
SHBN6703
SHBL0062
SHBH5043V
SHBH1200V

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The Journal of Organic Chemistry, 58, 4614-4614 (1993)
Bing-Jun Zhao et al.
The Journal of organic chemistry, 71(10), 3737-3742 (2006-05-06)
Thianthrene cation radical tetrafluoroborate (Th*+ BF4-) has been found to add to 2,3-dimethyl-2-butene (DMB) at 0 degrees C and -15 degrees C. The adduct, 2,3-dimethyl-2,3-(5,10-thianthreniumdiyl)butane ditetrafluoroborate (12), was isolated at -15 degrees C, and its 1H NMR spectrum was recorded
Maryline Pflieger et al.
Environmental science & technology, 47(12), 6239-6246 (2013-05-15)
In order to investigate the heterogeneous oxidation kinetics of the herbicide terbuthylazine (TERB), a stable and reproducible generation system of "dark" hydroxyl radical in the gas phase was developed and optimized using a PTR-MS. TERB was adsorbed on silica particles
Bridgett E Coleman et al.
The journal of physical chemistry. A, 114(48), 12667-12674 (2010-11-17)
The matrix isolation technique, combined with infrared spectroscopy and twin jet codeposition, has been used to characterize intermediates formed during the ozonolysis of 2,3-dimethyl-2-butene (DMB). Absorptions of early intermediates in the twin jet experiments grew up to 200% upon annealing
Relative reactivities of the excited states of furocoumarins for [2 + 2] photocycloaddition reaction with tetramethylethylene.
S C Shim et al.
Photochemistry and photobiology, 45(4), 453-458 (1987-04-01)
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Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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