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126152

Sigma-Aldrich

1,2-Difluorobenzene

98%

Sinonimo/i:

o-Difluorobenzene

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CHF 65.00
50 G
CHF 188.00

About This Item

Formula empirica (notazione di Hill):
C6H4F2
Numero CAS:
367-11-3
Peso molecolare:
114.09
Beilstein:
1905113
Numero CE:
206-680-7
Numero MDL:
MFCD00000284
Codice UNSPSC:
12352100
ID PubChem:
24847704
NACRES:
NA.22

CHF 65.00

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Livello qualitativo

200

Saggio

98%

Stato

liquid

Indice di rifrazione

n20/D 1.443 (lit.)

P. ebollizione

92 °C (lit.)

Punto di fusione

−34 °C (lit.)

Densità

1.158 g/mL at 25 °C (lit.)

Gruppo funzionale

fluoro

Stringa SMILE

Fc1ccccc1F

InChI

1S/C6H4F2/c7-5-3-1-2-4-6(5)8/h1-4H
GOYDNIKZWGIXJT-UHFFFAOYSA-N

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Categorie correlate

Descrizione generale

1,2-Difluorobenzene undergoes defluorination under very mild conditions by H2 in the presence of NaOAc over rhodium pyridylphosphine and bipyridyl complexes tethered on a silica-supported palladium catalyst[1].

Applicazioni

1,2-Difluorobenzene(1,2-DFB) has been used to study the mechanism of dissociation of o-, m- and p-difluorobenzene ions by threshold photoelectron photoion coincidence spectroscopy[2]. It has been used to study the room temperature adsorption of 1,2-DFB, 1,2-dichlorobenzene and 1,2-dibromobenzene on Si(100)2x1 by X-ray photoelectron spectroscopy and temperature programmed desorption[3]. It was used as solvent in electrochemical studies on transition metal complexes[4].
Solvent useful for electrochemical studies on transition metal complexes.[4]

Pittogrammi

Flame
GHS02

Avvertenze

Danger

Indicazioni di pericolo

H225

Consigli di prudenza

P210

Classi di pericolo

Flam. Liq. 2

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

33.8 °F - closed cup

Punto d’infiammabilità (°C)

1 °C - closed cup

Dispositivi di protezione individuale

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

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Certificati d'analisi (COA)

Lot/Batch Number
SDBB0154
STBL2588
STBL1054
BCCG4517
BCCD0302

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4-Bromo-1,2-difluorobenzene 98%

Sigma-Aldrich

263478

4-Bromo-1,2-difluorobenzene

Anne-Marie Boulanger et al.
Journal of the American Society for Mass Spectrometry, 20(1), 20-24 (2008-10-18)
Threshold photoelectron photoion coincidence (TPEPICO) experiments have shown that o-, m-, and p-difluorobenzene ions dissociate via a common, ring-opened intermediate and not via ionized p-difluorobenzene. Rice-Ramsperger-Kassel-Marcus (RRKM) modeling of the experimental breakdown curves yields activation energies for the initial isomerization
Hydrodefluorination of fluorobenzene and 1, 2-difluorobenzene under mild conditions over rhodium pyridylphosphine and bipyridyl complexes tethered on a silica-supported palladium catalyst.
Yang H, et al.
Organometallics, 18(12), 2285-2287 (1999)
Competition between associative and dissociative adsorption of 1, 2-dihalogenated benzenes on Si (100) 2? 1: Formation of dihalocyclohexadiene, halophenyl and phenylene adstructures.
Zhou XJ and Leung KT.
Surface Science, 600(16), 3285-3296 (2006)
Inorganic Chemistry, 28, 3923-3923 (1989)
Adrian Romero-Flores et al.
Chemosphere, 186, 151-159 (2017-08-05)
Electronic noses have been widely used in the food industry to monitor process performance and quality control, but use in wastewater and biosolids treatment has not been fully explored. Therefore, we examined the feasibility of an electronic nose to discriminate
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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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