Compounds of divalent silver, Ag(II), are unique within a plethora of known silver compounds. The 4d shell is open for Ag(II) rendering silver a genuine transition metal rather than a post-transition metal, as predominance of Ag(I) species might erroneously suggest. However, removal of an electron from the d shell comes with large energy prize and in consequence, most Ag(II) species are extremely ferocious oxidizers. Because of that, fluoride connections are prevalent in chemistry of Ag(II) [1]. Nevertheless, selected oxo-and N-bonded species may also be prepared at the cost of their metastability [2,3,4,5]. Aside from fascinating physics of low-dimensional Ag(II)-based magnets [6,7], the use of Ag(II) species as oxidizers is of interest in both inorganic and organic chemistry. In this context Ag(II)SO4 [2] and its hydrate [3] are probably the most interesting as their reactivity does not involve from F-transfer reactions, as is typical of the AgF2 counterpart. The most important pathways of reactivity of Ag(II)SO4 will be discussed in this talk including one-electron C-H bond activation, C-C coupling and pericyclic reactions with occasional O-insertion in the C-H bonds.
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