Benzils
| Benzils | |
|---|---|
 Benzila struktūrformula | |
| Ķīmiskā formula | C14H10O2 |
| Molmasa | 210,23 g/mol |
| Blīvums | 1230 kg/m3 |
| Kušanas temperatūra | 94-95 °C |
| Viršanas temperatūra | 346-348 °C |
Benzils (1,2-difeniletāndions, C6H5−CO−CO−C6H5) ir vienkāršākais pilnīgi aromātiskais diketons. Benzils ir dzeltena kristāliska viela.
Iegūšana
Benzilu iegūst no benzaldehīda benzoīna kondensācijas reakcijā.
Šajā reakcijā iegūto benzoīnu reducē ar vara sulfātu līdz benzilam:
- C6H5−CO−CHOH−C6H5 + 2 Cu2+ → C6H5−CO−CO−C6H5 + 2 H+ + 2 Cu+
Īpašības
Iedarbojoties uz benzilu ar karstu koncentrētu sārma šķīdumu, notiek pārgrupēšanās un rodas benzilskābe:
Izmantošana
Lieto organiskajām sintēzēm.
Ārējās saites
Vikikrātuvē par šo tēmu ir pieejami multivides faili. Skatīt: Benzils.
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