Reaction of Molecular Hydrogen with Tetraaminecopper(II) Sulfate Monohydrate

✍ Scribed by Seiichi Kanda; Toshinari Kori; Sigeo Kida

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 259 KB
• Volume: 108
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1046

✦ Synopsis

The reaction of tetraammincopper(II) sulfate monohydrate in a solid state with (\mathrm{H}{2}(10 \mathrm{MPa})) was studied. The (\mathrm{Cu}) (II) ion in the complex was reduced to (\mathrm{Cu}(0)). The final product was a mixture of (\left(\mathrm{NH}{4}\right){2} \mathrm{SO}{4}) and colloidal black (\mathrm{Cu}(0)) which showed a remarkable reactivity as follows. In thermogravimetric analysis up to (440^{\circ} \mathrm{C}) under nitrogen atmosphere, the above product reacted between the components very much differently from a control sample with the same composition. The six intermediate samples, taken at successive reaction times, were examined by powder diffraction method. As one of the intermediates, the copper double salt, (\left(\mathrm{NH}{4}\right){2} \mathrm{Cu}\left(\mathrm{SO}{4}\right){2}), was identified. 1994 Academic Press, Inc.