trans- Stilbene ( English trans-stilbene, (E) -stilbene ) - an aromatic hydrocarbon from the group of diarylethylenes . It is a trans isomer of an ethylene molecule with two phenyl groups at position 1 and 2.
| Trans-Stilben | |
|---|---|
 | |
 | |
| Are common | |
| Systematic name | trans-1,2-diphenylethylene |
| Chem. formula | C 14 H 12 |
| Physical properties | |
| condition | solid |
| Molar mass | 180.25 g / mol |
| Thermal properties | |
| T. melt. | 122-125 ° C |
| T. bale. | 305-307 ° C |
| Chemical properties | |
| Solubility in water | insoluble in water |
| Classification | |
| Reg. CAS number | 103-30-0 |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| Chebi | |
| ChemSpider | |
Isomers
The double bond determines the cis-trans isomerism of the stilbene molecule. The cis isomer is less stable due to spatial difficulties caused by the proximity of phenyl groups, which determines a significant difference in the properties of the isomers (for example, trans-stilbene is a crystalline substance under standard conditions, and the cis isomer is a liquid). Under the action of illumination, the isomers are capable of passing into each other.
Application
Stilbene is used in the manufacture of dyes, such as brilliant yellow or chrysophenin . Derivatives of stilbenes (triazinstilbenes and diphenylstilbenes) are used as brightness enhancers (dyes that absorb in the ultraviolet range and emit in visible blue). Active medium in dye lasers . Trans-stilbene crystals are used in scintillation counters .
In nature
Many stilbene derivatives are formed in plants. These, for example, include the plant antioxidants resveratrol and pterostilbene .
See also
- cis- stilben
- Dids
- Resveratrol
- Pterostilbene