2,5-diphenyloxazole 2,5-diphenyloxazole

structural formula

• numbering system
• physical property data
• toxicological data
• ecological data
• molecular structure data
• computing chemical data
• more
  • properties and stability
  • storage method
  • synthesis method
  • purpose

numbering system

cas number:92-71-7

mdl number:mfcd00005306

einecs number:202-181-3

rtecs number:rp6825000

brn number:157021

pubchem number:24893888

physical property data

1. character:acicular crystals. can evaporate slightly with water vapor.

2. density (g/ml,25/4℃)：1.0940

3. relative vapor density (g/ml,air=1): undetermined

4. melting point (ºc): 74

5. boiling point (ºc,normal pressure):360

6. boiling point (ºc, 94.7kpa): undetermined

7. refractive index:1.6231

8. flash point (ºc): ＞150

9. specific optical rotation (º): undetermined

10. autoignition point or ignition temperature (ºc): undetermined

11. vapor pressure (kpa,25ºc): undetermined

12. isotonic specific volume (90.2k)：502.1

4. surface tension (dyne/cm):43.0

5. polarizability（10^-24cm³): 26.09

compute chemical data

1. reference value for hydrophobic parameter calculation (xlogp): none

2. number of hydrogen bond donors: 0

3. number of hydrogen bond acceptors: 2

4. number of rotatable chemical bonds: 2

5. number of tautomers: none

6. topological molecule polar surface area 26

7. number of heavy atoms: 17

8. surface charge: 0

9. complexity: 231

10. number of isotope atoms: 0

11. determine the number of atomic stereocenters: 0

12. uncertain number of atomic stereocenters: 0

13. determine the number of chemical bond stereocenters: 0

14. number of uncertain chemical bond stereocenters: 0

15. number of covalent bond units: 1

properties and stability

none

storage method

this product should be sealed and stored in a cool place.

synthesis method

will1gbenzoylaminobenzene ethyl ketone is dissolved in5mlin sulfuric acid, heated over a water bath2min, pour into water, colorless crystals precipitate. filter, there is petroleum ether (boiling range50-70℃) recrystallized to get2,5-diphenyloxazole.

purpose

scintillation reagent.

tyle=”font-size: 9pt; color: #333333; font-family: 宋体; mso-ascii-font-family: ‘times new roman'”>℃) recrystallized to get2,5-diphenyloxazole.

purpose

scintillation reagent.