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  • Product Name:   2-Bromofluorene
  • Synonyms:   2-bromo-9h-fluorene;4-Bromo-2,2'-methylenebiphenyl
  • CAS No.:   1133-80-8
  • Molecular Formula:   C13H9Br
  • Molecular Weight :   245.11
  • Specification :   98%
  • Place of Origin:   China
  • Appearance :   
  • Document :   Download

Description of 2-Bromofluorene



2-Bromofluorene Chemical Properties


Melting point  112-114 °C(lit.)


Boiling point  185 °C135 mm Hg(lit.)


density  1.4187 (rough estimate)


refractive index  1.6290 (estimate)


Fp  185°C/135mm


solubility  Soluble in chloroform and ethyl acetate.


form  Slightly Crystalline Powder or Flakes


color  White to slightly yellow


BRN  1946701


InChIKey FXSCJZNMWILAJO-UHFFFAOYSA-N


CAS DataBase Reference 1133-80-8(CAS DataBase Reference)


NIST Chemistry Reference 9H-Fluorene, 2-bromo-(1133-80-8)




Safety Information


Hazard Codes  Xi


Risk Statements  36/37/38


Safety Statements  26-37/39


WGK Germany  3


HazardClass  IRRITANT




2-Bromofluorene Usage And Synthesis


Outline 2-bromofluorene is often used as synthetic intermediate of the OLED material in industry, by the reaction of barbier-type ultrasonic radiation, 2-bromofluorene is also used to study the conversion of aryl bromides to aryl triethoxy silane.
Lab Preparation Methods: propylene carbonate is used as solvent, N-bromosuccinimide (NBS) is used as brominated reagent to carry bromination reaction of fluorine, and this reaction can synthesize 2-bromofluorene and 2,7-dibromofluorene. By the investigation of reaction temperature, NBS amount, the adding methods, the optimal reaction conditions for the synthesis of 2-bromofluorene is confirmed. The optimal reaction conditions are: reaction temperature is 23℃, the molar ratio of NBS with fluorine is 1.1:1, NBS is added by stage addition. First fluorene and propylene carbonate is preheated to 60℃, so fluorine is all dissolved, and then it drops to the reaction temperature, NBS is added by stage addition. 2-bromofluorene and 2,7-dibromofluorene recrystallizes with ethanol and acetic acid respectively, the purity of target product of liquid chromatography can reach more than 99%.


Uses (1) It can be used as pharmaceutical intermediate, it is also important intermediate in the synthesis of optoelectronic material.
(2) By ultrasonic radiation of Barbier-type reaction, 2-bromofluorene is used for the study of aryl bromide (aryl bromides) converts to aryl triethoxysilane (aryltriethoxysilanes). It is also for the preparation of N-carbazole fluorene oligomers end-capped. It can be used as intermediates of OLED materials in industry.


Chemical Properties white to slightly yellow crystalline powder




2-Bromofluorene Preparation Products And Raw materials


Preparation Products 2-Bromo-9,9-dimethylfluorene


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