134450-56-9

Basic information

• Product Name: 4,5-Difluorophthalonitrile
• Synonyms: 4,5-Difluorophthalonitrile;1,2-Dicyano-4,5-difluorobenzene;4,5-Difluorophthlonitrile
• CAS NO: 134450-56-9
• Molecular Formula: C₈H₂F₂N₂
• Molecular Weight: 164.1116864
• Mol File: 134450-56-9.mol
• Article Data: 4

Chemical Properties

• Melting Point: 112.0 to 116.0 °C
• Boiling Point: 305.3±42.0 °C(Predicted)
• Appearance: /
• Density: 1.37±0.1 g/cm3(Predicted)
• Storage Temp.: Inert atmosphere,Room Temperature
• CAS DataBase Reference: 4,5-Difluorophthalonitrile(CAS DataBase Reference)
• NIST Chemistry Reference: 4,5-Difluorophthalonitrile(134450-56-9)
• EPA Substance Registry System: 4,5-Difluorophthalonitrile(134450-56-9)

Safety Data

• RIDADR: 3439
• HazardClass: 6.1
• PackingGroup: III
• Hazardous Substances Data: 134450-56-9(Hazardous Substances Data)

Usage

Uses

4,5-Difluorophthalonitrile is used in preparation of benzo[g]pteridine as organic electron transfer mediator.

InChI:InChI=1S/C8H2F2N2/c9-7-1-5(3-11)6(4-12)2-8(7)10/h1-2H

Upstream product

• 557-21-1 zinc(II) cyanide 
• 64695-78-9 1,2-difluoro-4,5-dibromobenzene 

Downstream Products

• 1259331-74-2 4,5-di(2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl)phthalonitrile 
• 1259331-72-0 4,5-di(2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl)phthalonitrile 
• 1259331-73-1 4,5-di(2,3,4,6-tetra-O-acetyl-1-thio-β-D-glucopyranosyl)phthalonitrile 
• 18959-31-4 4,5-difluorophthalic acid 
• 1416881-50-9 1,2‐bis(carbazol‐9‐yl)‐4,5‐dicyanobenzene 

Relevant articles and documents

Preparation method of 4, 5-difluorophthalic acid

The invention discloses a preparation method of 4, 5-difluorophthalic acid. The specific method comprises the following steps: S1: synthesis of 4, 5-difluoro-1, 2-phthalonitrile: adding 4, 5-difluoro-1, 2-dihalobenzene and polymethylhydrosiloxane into a reaction container, stirring and dissolving with N, N-dimethylacetamide, carrying out reaction, cooling after the reaction is finished, adding tri(dibenzylideneacetone)dipalladium and 1, 1 '-bis (diphenylphosphine) ferrocene under the protection of nitrogen, slowly adding zinc cyanide for reaction, cooling after the reaction is finished, adding water, adjusting the pH to 8 by using a sodium bicarbonate solution under vigorous stirring, stirring for 2 hours, standing, filtering, washing, and eluting and purifying by using an ethyl acetate mixed solvent of petroleum ether to obtain an off-white solid intermediate 4, 5-difluoro-1, 2-dicyanobenzene; and S2, synthesis of 4, 5-difluoro-1, 2phthalic acid. The process is safe, efficient, easy to operate, low in equipment requirement, low in raw material cost and easy for industrial production.

DOPANT FOR ORGANIC OPTOELECTRONIC DEVICE, ORGANIC OPTOELECTRONIC DEVICE, AND DISPLAY DEVICE

The present invention relates to: a dopant for an organic optoelectronic device, represented by chemical formula 1; an organic optoelectronic device including the dopant; and a display device.