Polonium oxide fluorides

Table 12.5 shows evidence for the trends that we have come to expect. The highest oxidation number (+6) is stabilized by fluorine only in the cases of selenium and tellurium PoF is not known. There are no low oxidation number fluorides, apart from F—Se—Se—F and Se=SeF2, and these can only be trapped at low temperatures. Selenium forms no iodides, but the more electropositive tellurium and polonium do. 

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