Diphenyl ethyl diketone, also known as bibenzoyl, benzoyl, bibenzoyl, dibenzoyl, chemical formula (C6H5CO)2, often abbreviated as (PhCO)2. A diketone used as an intermediate in organic synthesis. Under ultraviolet irradiation, diphenyl ethyl diketone is cracked into free radicals, which causes cross-linking between polymer chains and is therefore used as a photoinitiator in the solidification of polymers. Recent studies have shown that diphenyl ethyl diketone is a selective inhibitor of carboxylesterase. In the laboratory, diphenyl ethyl diketone can be prepared by condensation of benzoin from benzaldehyde, and then oxidized by copper sulfate to obtain:
PhC(O)CH(OH)Ph + 2 Cu2+ → PhC(O)C(O)Ph + 2 H+ + 2 Cu+
Under alkaline condition, diphenyl ethyl diketone is rearranged by dibenzoic acid and acidified to obtain dibenzoic acid.
| Name | Benzil | EINECS | 205-157-0 |
| CAS No. | 134-81-6 | Density | 1.165 g/cm3 |
| PSA | 34.14000 | LogP | 2.75220 |
| Solubility | Soluble in ethanol, ethyl ether, chloroform, ethyl acetate, benzene, toluene, nitrobenzene. Insoluble in water | Melting Point | 94-95 °C(lit.)
|
| Formula | C14H10O2 | Boiling Point | 347 °C at 760 mmHg |
| Molecular Weight | 210.232 | Flash Point | 142.559 °C |
| Transport Information | N/A | Appearance | yellow crystals or powder |
Appearance and properties: yellow crystal
Density: 1,521 g/cm3
Boiling point: 346 °C
Melting point: 94-95 °C(lit.)
Flash point: 346-348°C
Refractive index: 1.594
Water solubility: 0.5g /L (20 ºC)
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Storage conditions: ventilation and dry at low temperature
Vapor pressure: 5.54E-05mmHg at 25°C
Usage
1. Organic synthesis. Insecticide. Used as a photocuring agent for photosensitive adhesives and photocuring coatings.
2. Used as pharmaceutical intermediates.
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