Abstract
The formations of two kinds of red-violet complex were observed in the reaction of cysteamine (2-mercaptoethylamine) with copper. They were considered to be mixed valence complex and that containing molecular oxygen respectively. Their structures and processes of the formations were presumed from the results of pH, potentiometric and photometric titrations, visible and infrared spectra, and the estimation of copper (I) in the complexes. Analogous results were obtained in some of the related compounds of cysteamine.
