Witches
Hexenes (emphasis on the second syllable) are chemical compounds from the group of alkenes with the empirical formula C 6 H 12 . The root Hex indicates the six carbon atoms , the ending en indicates the double bond between two of the carbon atoms. There are various isomers which differ in the position of the double bond and the presence or location of a branch in the carbon chain. The most commonly used compound in industry is 1-hexene , which is e.g. B. as a comonomer in the production ofPolyethene is used.
Isomers
Without branching
With simple branching
- 2-methyl-1-pentene
- 2-methyl-2-pentene
- 3-methyl-1-pentene (two enantiomers )
- 3-methyl-2-pentene (occurs in cis and trans forms )
- 4-methyl-1-pentene
- 4-methyl-2-pentene (occurs in cis and trans forms )
- 2-ethyl-1-butene
With double branching
properties
| Surname | Structural formula | CAS number |
Melting point in ° C |
Boiling point in ° C |
Density in g / cm 3 |
Refractive index (589 nm) |
|---|---|---|---|---|---|---|
| 1 witches |  |
592-41-6 | −139.76 | 63.48 | 0.6685 (25 ° C) | 1.3852 (25 ° C) |
| ( E ) -2-hexene | -hex-2-ene_200.svg){kind=small} |
4050-45-7 | −133 | 67.9 | 0.6733 (25 ° C) | 1.3936 (20 ° C) |
| ( Z ) -2-hexene | -hex-2-ene_200.svg) |
7688-21-3 | −141.11 | 68.8 | 0.6824 (25 ° C) | 1.3979 (20 ° C) |
| ( E ) -3-hexen | -hex-3-ene_200.svg){kind=small} |
13269-52-8 | −115.4 | 67.1 | 0.6772 (20 ° C) | 1.3943 (20 ° C) |
| ( Z ) -3-hexene | -hex-3-ene_200.svg) |
7642-09-3 | −137.8 | 66.4 | 0.6778 (20 ° C) | 1.3947 (20 ° C) |
| 2-methyl-1-pentene |  |
763-29-1 | −135.7 | 62.1 | 0.6799 (20 ° C) | 1.3920 (20 ° C) |
| 2-methyl-2-pentene |  |
625-27-4 | −135 | 67.3 | 0.6863 (20 ° C) | 1.4004 (20 ° C) |
| 3-methyl-1-pentene |  |
760-20-3 | −153 | 54.2 | 0.6675 (20 ° C) | 1.3841 (20 ° C) |
|
-3-methylpent-1-ene_200.svg) |
39914-58-4 | ||||
|
-3-methylpent-1-ene_200.svg) |
5026-95-9 | ||||
| ( E ) -3-methyl-2-pentene | -3-methylpent-2-ene_200.svg) |
616-12-6 | −138.5 | 70.4 | 0.6930 (25 ° C) | 1.4045 (20 ° C) |
| ( Z ) -3-methyl-2-pentene | -3-methylpent-2-ene_200.svg) |
922-62-3 | −134.8 | 67.7 | 0.6886 (25 ° C) | 1.4016 (20 ° C) |
| 4-methyl-1-pentene |  |
691-37-2 | −153.6 | 53.9 | 0.6642 (20 ° C) | 1.3828 (20 ° C) |
| ( E ) -4-methyl-2-pentene | -4-methylpent-2-ene_200.svg) |
674-76-0 | −140.8 | 58.6 | 0.6686 (20 ° C) | 1.3889 (20 ° C) |
| ( Z ) -4-methyl-2-pentene | -4-methylpent-2-ene_200.svg) |
691-38-3 | −134.8 | 56.3 | 0.6690 (20 ° C) | 1.3800 (20 ° C) |
| 3-methylidene pentane |  |
760-21-4 | −131.5 | 64.7 | 0.6894 (20 ° C) | 1.3969 (20 ° C) |
| 2,3-dimethyl-1-butene |  |
563-78-0 | −157.3 | 55.6 | 0.6803 (20 ° C) | 1.3995 (20 ° C) |
| 2,3-dimethyl-2-butene |  |
563-79-1 | -74.19 | 73.3 | 0.7080 (20 ° C) | 1.4122 (20 ° C) |
| 3,3-dimethyl-1-butene |  |
558-37-2 | −115.2 | 41.2 | 0.6529 (20 ° C) | 1.3763 (20 ° C) |
Web links
Commons : Hexene - Collection of pictures, videos and audio files
Individual evidence
- ↑ a b c d 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. 3-1 - 3-523.