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34125

Sigma-Aldrich

Dibromodifluoromethane

≥95.0% (GC)

Synonym(s):

Carbon dibromide difluoride, Difluorodibromomethane

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About This Item

Empirical Formula (Hill Notation):
CBr2F2
CAS Number:
75-61-6
Molecular Weight:
209.82
Beilstein:
1732515
EC Number:
200-885-5
MDL number:
MFCD00000367
UNSPSC Code:
12352100
PubChem Substance ID:
57649084
NACRES:
NA.22
Pricing and availability is not currently available.

vapor density

7.24 (vs air)

vapor pressure

12.79 psi ( 20 °C)

Assay

≥95.0% (GC)

form

liquid

refractive index

n20/D 1.398 (lit.)
n20/D 1.398

bp

22-23 °C (lit.)

mp

−142-−141 °C (lit.)

density

2.297 g/mL at 25 °C (lit.)

functional group

bromo
fluoro

storage temp.

2-8°C

SMILES string

FC(F)(Br)Br

InChI

1S/CBr2F2/c2-1(3,4)5

InChI key

AZSZCFSOHXEJQE-UHFFFAOYSA-N

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General description

The photolysis products of dibromodifluoromethane were characterized by matrix isolation infrared and UV/Visible spectroscopy.[1] Free radical addition of dibromodifluoromethane with fluoroolefins has been reported.[2] Dibromodifluoromethane reacts with hydrocarbon olefins to yield 1,3-dibromo-1,1-difluoroalkene.[3] Sulfinatodehalogenation reagent promoted addition reaction of difluorodibromomethane with alkenes, alkynes and cyclic enol ethers has been described.[4]

Application

  • Synthesis of 3‑Fluoropyrazoles via Radical-Polar Crossover Photoinduced Cyclization: This study highlights the use of dibromodifluoromethane (CF2Br2) for the synthesis of valuable difluorinated and monofluorinated compounds through a novel photoinduced cyclization process (MA Reed, ND Patil, Synfacts, 2023).

Other Notes

Reagent for the Wittig olefination of carbonyl compounds to difluoromethylene and fluoromethylene derivatives[5][6]; Precursor of difluorocarbene[7]

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335,H420

Hazard Classifications

Eye Irrit. 2 - Ozone 1 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
STBK7817
STBK7439
STBJ5349
STBH5635
STBG6996

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Free Radical Additions Involving Fluorine Compounds. IV. The Addition of Dibromodifluoromethane to Some Fluoroolefins1.
Tarrant P, et al.
Journal of the American Chemical Society, 77(10), 2783-2787 (1955)
H.P. Fritz et al.
Zeitschrift fur Naturforschung, B: Chemical Sciences, 86, 1375-1375 (1981)
Free Radical Additions Involving Fluorine Compounds. I. The Addition of Dibromodifluoromethane to Hydrocarbon Olefins.
Tarrant P and Lovelace AM.
Journal of the American Chemical Society, 76(13), 3466-3468 (1954)
S. Hayaski et al.
Chemistry Letters (Jpn), 983-983 (1979)
Lisa George et al.
The Journal of chemical physics, 132(8), 084503-084503 (2010-03-03)
The photolysis products of dibromodifluoromethane (CF(2)Br(2)) were characterized by matrix isolation infrared and UV/Visible spectroscopy, supported by ab initio calculations. Photolysis at wavelengths of 240 and 266 nm of CF(2)Br(2):Ar samples (approximately 1:5000) held at approximately 5 K yielded iso-CF(2)Br(2)
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Questions

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  1. 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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  2. 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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