Demonstrating the Presence of Cyanide in Bitter Seeds while Helping Students Visualize Metal–Cyanide Reduction and Formation in a Copper Complex Reaction

• Giorgio Volpi ^[1]
  1. [1] University of Turin

     University of Turin

     Torino, Italia

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 93, Nº 5, 2016, págs. 891-897
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • An activity for hydrogen cyanide detection in bitter seeds is presented. The procedure is based on the absorption of hydrogen cyanide (HCN) from a mixture of chopped seeds into a ninhydrin or tetramminecopper(II) complex solution followed by their reaction. A qualitative experiment is proposed in order to demonstrate the presence of HCN in bitter seeds and to visualize metal–cyanide reduction and formation of an interesting mixed valence copper amino–cyanide complex: Cu3(NH3)4(CN)4.