1,2,4-Trichlorobenzene → Phthalic Anhydride

Reaction equation

Cl[CH:2]1[CH:12]=[CH:11][CH:5]2[C:6]([O:8][C:9](=[O:10])[CH:4]2[CH2:3]1)=[O:7].ClC1C=CC(Cl)=CC=1Cl.ClC1C=C2C(=O)OC(=O)C2=CC=1>>[C:9]1(=[O:10])[O:8][C:6](=[O:7])[C:5]2=[CH:11][CH:12]=[CH:2][CH:3]=[C:4]12

Participants

Reactant 3

HCID 131,2,4-Trichlorobenzene

HCID 670444-Chlorophthalic anhydride

HCID 54187688HCID 54187688, compound

Product 1

HCID 6811Phthalic Anhydride

Conditions

Temperature: 190 °C

Procedure

A reaction flask was charged with 1.97 g of 4-chlorotetrahydrophthalic anhydride and 0.98 g of activated carbon (DARCO KB-60). 1,2,4-trichlorobenzene (15 mL) was added and the reaction heated to 190° C. Analysis of the reaction mixture showed the formation of 4-chlorophthalic anhydride, with no phthalic anhydride formed at all.