Halkons
| Halkons | |
|---|---|
 Halkona struktūrformula | |
| Ķīmiskā formula | C15H12O |
| Molmasa | 208,26 g/mol |
| Blīvums | 1071 kg/m3 |
| Kušanas temperatūra | 55-57 °C |
| Viršanas temperatūra | 345-348 °C |
Halkons (fenilstirilketons, benzālacetofenons, benzilidēnacetofenons, 1,3-difenil-2-propēn-1-ons, C6H5−CO−CH=CH−C6H5) pieder pie nepiesātinātajiem aromātiskajiem ketoniem. Halkons ir dzeltena kristāliska viela.
Atrašanās dabā
Halkona atvasinājumi ir flavonoīdu biosintēzes starpprodukti.
Iegūšana
Iegūst no benzaldehīda un acetofenona aldolās kondensācijas reakcijā. Kā katalizatoru lieto nātrija hidroksīdu.
Izmantošana
Halkona atvasinājumiem ir antibakteriāla, pretsēnīšu un pretaudzēju iedarbība. Tos lieto arī kā degšanas inhibitorus.
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