Product

2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE

CAS No.：36978-41-3

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2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE Basic information

Product Name:	2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE
Synonyms:	4,5'-bi-2-benzofuran-1,1',3,3'-tetrone;2,3,3',4'-biphenyl tetraCarbocylic dianhydride;[4,5']BIISOBENZOFURANYL-1,3,1',3'-TETRAONE;1,1'-Biphenyl-2,3,3',4'-tetracarboxylic acid 2,3:3',4'-dianhydride;2,3,3',4'-Biphenyltetracarboxylic 2,3:3',4'-dianhydride;4,5'-Bi(1,3-isobenzofurandione);4,5'-Bi[isobenzofuran]-1,1',3,3'-tetrone;4,5'-Bi[isobenzofuran-1,3-dione]
CAS:	36978-41-3
MF:	C16H6O6
MW:	294.22
EINECS:	811-539-3
Product Categories:	strong recommend;36978-41-3
Mol File:	36978-41-3.mol

2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE Chemical Properties

Melting point	199 °C
Boiling point	609.3±48.0 °C(Predicted)
density	1.625±0.06 g/cm3(Predicted)
storage temp.	Inert atmosphere,Room Temperature
form	powder to crystal
color	White to Almost white
CAS DataBase Reference	36978-41-3(CAS DataBase Reference)
EPA Substance Registry System	[4,5'-Biisobenzofuran]-1,1',3,3'-tetrone (36978-41-3)

Safety Information

HS Code

2922498590

MSDS Information

2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE Usage And Synthesis

Uses

2,3,3',4'-Biphenyltetracarboxylic dianhydride be used for the preparation of a polyimide material.

Preparation

The preparation of 2,3,3',4'-biphenyl tetracarboxylic dianhydride is as follows:In a 1000 ml three-necked flask, 18.3 g (0.1 mol) of 4-chlorophthalic anhydride and 18.3 g (0.1 mol) were added 3-chlorophthalic anhydride, 300 g of anisole as solvent, 0.13 g (0.001 mol) of nickel chloride as a catalyst, 0.198 g (0.001 mol) of C-1 as a catalyst ligand, and 0.03 g (0.0003 mol) of sodium bromide as a catalyst Auxiliary, 13 g (0.2 mol) of zinc powder was used as a reducing agent, and the reaction was stirred at 30 ° C for 8 hours under a nitrogen atmosphere. The reaction solution was filtered to remove insoluble solids in the reaction liquid. 300 g of methanol was added to the filtration mother liquor, and the product was precipitated, filtered, and dried to obtain 25.8 g of the product 2,3,3',4'-biphenyltetracarboxylic dianhydride, yield 87.7%.

2,3,3',4'-BIPHENYL TETRACARBOXYLIC DIANHYDRIDE Preparation Products And Raw materials

Raw materials

4-(1,3-dioxo-2-benzofuran-4-yl)-2-benzofuran-1,3-dione-->3,3',4,4'-Biphenyltetracarboxylic dianhydride-->5-Iodoisobenzofuran-1,3-dione-->3-IODOPHTHALIC ANHYDRIDE-->1,1'-Biphenyl-2,3,3',4'-tetracarboxylic acid-->3-Bromophthalic anhydride-->4-BROMO PHTHALIC ANHYDRUS

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