Ag₃(SO₃F)₄: A Rare Example of a Mixed‐Valent Ag^II/Ag^I Compound Showing 1D Antiferromagnetism

Silver(II) Fluorosulfate: A Thermally Fragile Ferromagnetic Derivative of Divalent Silver in an Oxa‐Ligand Environment

“…[5] www.eurjic. Our own results confirmed the existence of these salts; [11] however, we note that they cannot be formed in a direct reaction between the corresponding pseudobinary fluorosulfates, see for example Equation (6). (6) This is due to a lack of thermal stability of the Ag-(SO 3 F) 2 precursor (see next section).…”

“…[28] 2AgSO 3 F Ǟ Ag 2 SO 4 + SO 2 F 2 Ȇ (-16.7 wt.-%) (11) Ag 2 SO 4 is the ultimate product of thermal decomposition at 400°C as confirmed by XRD and IR spectroscopy as well as the presence of the characteristic sharp endothermic peak of its phase transition at 425°C in the DSC profile [29] ( Figure 5). …”

“…Decomposition does not stop at the Ag 3 (SO 3 F) 4 stage since this compound is equally unstable as Ag(SO 3 F) 2 [11] and it decomposes to Ag I SO 3 F. Further heating results in decomposition of Ag I SO 3 F to Ag 2 SO 4 with evolution of SO 2 F 2 [Equation (11)], similarly to the process observed for M(SO 3 F) 2 (M = Sr, Ba). [28] 2AgSO 3 F Ǟ Ag 2 SO 4 + SO 2 F 2 Ȇ (-16.7 wt.-%) (11) Ag 2 SO 4 is the ultimate product of thermal decomposition at 400°C as confirmed by XRD and IR spectroscopy as well as the presence of the characteristic sharp endothermic peak of its phase transition at 425°C in the DSC profile [29] ( Figure 5).…”

“…In a parallel report we describe related mixed-valent Ag 3 (SO 3 F) 4 . [11] A contribution on related Ag II (SO 3 CF 3 ) 2 will follow shortly. [12] Results and Discussion…”

Unusual Thermal Decomposition of AgIISO4 Yielding AgI2S2O7: Bending Hammond’s Rule

“…Thus Ag II is stabilized in connections with fluoride ligands, [2] whereas its oxo and aza compounds are rare and are quite unstable thermodynamically and thermally. [3,4,5,6,7,8] Here we investigate in detail the thermal decomposition of recently synthesized Ag II sulfate, AgSO 4 . [4] The activation energy for decomposition turns out to be substantial (%127 kJ mol…”