Benzopyran
 |
| 1-Benzopyran/Chromene | |
|---|---|
| 2H-1-Benzopyran | |
| General | |
| Systematic name | 2H-chromene |
| Other names | 2H-1-benzopyran |
| Chemical formula | C9H8O |
| CAS number | 254-04-6 |
| Properties | |
| Molecular weight | 132.159 |
| Density | 1.0993 g/cm3 (at 289 K) |
| Boiling point | 405 K (at .1342 atm) |
| Refractive index | 1.5869 (at 297 K and wavelength of 589 nm) |
Benzopyran is an polycyclic organic compound that results from the fusion of a benzene ring to a heterocyclic pyran ring. According to IUPAC nomenclature it is called chromene. There are two isomers of benzopyran depending on the orientation of the fusion of the two rings, resulting in 1-benzopyran (chromene) and 2-benzopyran (isochromene). Each of these structures has further isomers depending on the position of the carbon that is fully saturated hence giving rise to 2H-1-benzopyran (2H-chromene) and 4H-1-benzopyran (2H-chromene).
Benzopyrones are ketone derivatives of benzopyrans and they include:
Benzopyrones constitutes the skeleton of many flavonoid compounds.
See also
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