Abstract
Thermal decomposition of the ammonium hexachlorometalates (NH 4) 2[MCl 6] (M ≡ Pd, Re, Os, Ir, Pt), (NH 4) 3[RhCl 6 · H 2O (NH 4) 4[Ru 2Cl 10O] was investigated by means of thermogravimetry, differential thermal analysis, mass spectrometry and X-ray diffraction dependent upon temperature. All ammonium compounds produce, finally, finely divided metal powders. Nitrogen and hydrogen chloride, are released as gases attesting to the internal redox reaction M 4+ (M 3+) + N 3− → N 2 ±0 + M ±0 which takes place in all cases at temperatures between 300 and 450 °C depending upon the heating rates and the element M. For M ≡ Rh and Pd, stable intermediates could be detected, namely (NH 4) 2[Rh(NH 3)Cl 5] and (NH 4) 2[PdCl 4].
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
