Benzene → 4-Fluoroanilinium 2,3-dichloromaleate

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Reaction Steps

9.25g (0.05 mol) of 2,3-dichloromaleic acid was dissolved in 50 ml of benzene. To the resulting solution 20 ml of benzene containing 5.55g (0.05 mol) of 4-fluoroaniline was added dropwise over a period of 20 min. at temperatures of 15°-25° C under agitation. After completing the addition, the mixture was agitated at that temperature for 30 min. during which time crystals formed, which were separated by filtration and washed with benzene to obtain 14.7g of 4-fluoroanilinium 2,3-dichloromaleate in the form of white crystal at a yield of 98.7%. The crystal had a melting point (decomposition point) of 207° C and is expressed by the following formula: ##STR2## The results of elementary analysis were as follows:

Provenance & Evidence