Trifluorobenzenes
| Trifluorobenzenes | |||||
| Surname | 1,2,3-trifluorobenzene | 1,2,4-trifluorobenzene | 1,3,5-trifluorobenzene | ||
| other names | vic. -Trifluorobenzene | asym. -trifluorobenzene | sym. -trifluorobenzene | ||
| Structural formula |
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| CAS number | 1489-53-8 | 367-23-7 | 372-38-3 | ||
| PubChem | 15147 | 67773 | 9745 | ||
| Molecular formula | C 6 H 3 F 3 | ||||
| Molar mass | 132.08 g mol −1 | ||||
| Physical state | liquid | ||||
| Melting point | −4 ° C | −12 ° C | −5.5 ° C | ||
| boiling point | 94-95 ° C | 90 ° C | 75-76 ° C | ||
| density | 1.28 g cm −3 (25 ° C) |
1.264 g cm −3 (25 ° C) |
1.277 g cm −3 (25 ° C) |
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GHS labeling |
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| H and P phrases | 225-315-319-335 | ||||
| no EUH phrases | |||||
| 210-261-305 + 351 + 338 | |||||
In organic chemistry, the trifluorobenzenes form a group of substances consisting of a benzene ring with three fluorine atoms (–F) as substituents . Their different arrangement results in three constitutional isomers with the empirical formula C 6 H 3 F 3 .
properties
The melting points behave rather inconsistently. The most symmetrical representative in this group (1,3,5-trifluorobenzene) has a melting point of −5.5 ° C and thus differs little from the other two isomers.
literature
- AM Roe, RA Burton, DR Reavill: The Preparation of 1,2,3-Trifluorobenzene and of 2,3- and 2,6-Difluorophenyl Compounds , in: Chem. Commun. (London), 1965 , pp. 582a-582a; doi : 10.1039 / C1965000582A .
- MD Bertolucci, RE Marsh: Lattice parameters of hexafluorobenzene and 1,3,5-trifluorobenzene at −17 ° C , in: J. Appl. Cryst. , 1974 , 7 , pp. 87-88; doi : 10.1107 / S0021889874008764 .
- MT Kirchner, D. Bläser, R. Boese, TS Thakur, GR Desiraju: 1,2,3-Trifluorobenzene , in: Acta Cryst. , 2009 , E65 , o2670; doi : 10.1107 / S1600536809038975 ; PDF .
Individual evidence
- ↑ Entry on 1,2,3-trifluorobenzene at TCI Europe, accessed on September 18, 2011.
- ↑ 1,2,4-trifluorobenzenes; CAS number: 367-23-7 - pharmaceutical intermediate - english.alibaba.com - 105624532 .
- ↑ a b c d data sheet 1,3,5-trifluorobenzene from Sigma-Aldrich , accessed on May 11, 2011 ( PDF ).
- ↑ a b c data sheet 1,2,3-trifluorobenzene from Sigma-Aldrich , accessed on May 11, 2011 ( PDF ).
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-500.
- ↑ a b data sheet 1,2,4-trifluorobenzene from Sigma-Aldrich , accessed on May 11, 2011 ( PDF ).
Web links
Commons : Trifluorobenzenes - Collection of images, videos and audio files
