Thermal decomposition of [Mg(NH3)6](NO3)2, [Ni(NH3)6](NO3)2 and [Ni(ND3)6](NO3)2

Ni(NH3)2(NO3)2—A 3-D Network through Bridging Nitrate Units Isolated from the Thermal Decomposition of Nickel Hexammine Dinitrate

“…Ultimately only H2O is released at high temperatures. These observed gaseous products match well to those observed previously for the decomposition of the hexammine nitrate in either argon or helium [6,7]. It could be concluded that [Ni(NH3)6](NO3)2 firstly loses ammonia to form lower ammine complexes, before loss of the remaining ammonia molecules coincides with the decomposition of the nitrate anions into nitrogen and nitrous oxides.…”

“…Ultimately only H 2 O is released at high temperatures. These observed gaseous products match well to those observed previously for the decomposition of the hexammine nitrate in either argon or helium [6,7]. of the respective diammine Ni(NH3)2(NO3)2.…”

“…Associated with this work, we were able to demonstrate that the reaction of ammonia with nickel nitrate hexahydrate induces ligand exchange and the growth of nickel nitrate hexammine crystals [5]. The thermal decomposition of nickel nitrate hexammine has been discussed previously in the literature [6,7] and the products of the decomposition tentatively identified. The structure of the proposed thermodynamically stable intermediate decomposition product nickel diammine nitrate has remained unknown.…”

“…This can be attributed to the different bonding environments of the species. While the nitrate anion in hexammine nickel nitrate is not coordinated directly to the complex and [4] given in blue and Ni(NH 3 ) 6 (NO 3 ) 2 [5] given in black.…”

“…In this work, we revisit the thermal decomposition of [Ni(NH 3 ) 6 ](NO 3 ) 2 and determine the conditions for synthesis of the respective 6 ](NO 3 ) 2 Nickel hexammine, [Ni(NH 3 ) 6 ](NO 3 ) 2 , was prepared using our previously published method, and its complete characterisation is discussed therein [5]. [Ni(NH 3 ) 6 ](NO 3 ) 2 was studied by simultaneous thermal analysis that combined thermogravimetry (TG), differential thermal analysis (DTA), and evolved gas analysis by mass spectrometry (MS) in the same experiment ( Figure 1). The thermal decomposition of the material is evidently complex and clear steps are, especially at higher temperatures, hard to distinguish.…”