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) . 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  and its hydrate  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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