Primaquine, Chloroquine, 8-aminoquinoline and 4-aminoquinalidine form molecular complexes with chloranil at pH 9. The composition and stability of these complexes have been studied spectrophotometrically. The results indicate that all complexes were of 1:1 type. The method of complexation was used to determine a ppm amount of the intended compounds in solution spectrophotometrically.
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