1,2-Difluorobenzene
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Preferred IUPAC name
1,2-Difluorobenzene
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| Other names
o-Difluorobenzene
ortho-Difluorobenzene |
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3D model (JSmol)
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| ECHA InfoCard | 100.006.074 | ||
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PubChem CID
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| Properties | |||
| C6H4F2 | |||
| Molar mass | 114.093 g/mol | ||
| Appearance | colorless liquid | ||
| Density | 1.1599 g/cm3 | ||
| Melting point | −34 °C (−29 °F; 239 K) | ||
| Boiling point | 92 °C (198 °F; 365 K) | ||
| (insoluble) 1.14 g/L | |||
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |||
1,2-Difluorobenzene, also known as DFB, is an aromatic compound with formula C6H4F2. This colorless liquid is a solvent used in the electrochemical studies of transition metal complexes.
1,2-Difluorobenzene is prepared by a simple substitution reaction of fluorine with fluorobenzene.
The 1,4-isomer and small amounts of the 1,3-isomer are also produced in the reaction as the fluorine group on the aromatic ring of fluorobenzene is ortho- and para- directing.
1,2-Difluorobenzene has been used as solvent for the electrochemical analysis of transition metal complexes. It is relatively chemically inert, weakly coordinating, and has a dielectric constant high enough to dissolve many electrolytes and metal complex salts. It is used as a weakly coordinating solvent for metal complexes, alternative to the relatively more strongly coordinating solvents acetonitrile, DMSO, and DMF.
1,2-Difluorobenzene can be acylated to 3',4'-difluoropropiophenone, which has interesting application in the synthesis of halogenated cathinone/PPA congeners.
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