Studies on Thiohydroxamic Acids and Their Metal Chelates. VII. Syntheses of Some Compounds Possessing Mercapto and Hydroxyimino Groups and Their Reactivities with Metal Ions

Abstract

Several compounds possessing both mercapto and hydroxyimino groups, such as 2-mercaptoacetophenone oxime, 3-mercaptopropiophenone oxime and 5-nitro-2-mercapto-benzaldehyde oxime, were prepared, and their reactivities with metal ions were compared with those of the corresponding ketones or aldehyde and those of thiohydroxamic acids. It was found that these compounds did not show any sensitive color reactions with Fe³⁺, Ti⁴⁺, UO²⁺₂ and VO²⁺ and did not form stable Fe³⁺ and Cu²⁺ complexes, differing from thiohydroxamic acids, and that the conversions of the compounds possessing both carbonyl and mercapto group to the corresponding oximes did not give any effect on the sensitivities and selectivities.