Abstract
A previous study [1] of the SnF2/SnF4 system has shown the presence 4 mixed oxidation state fluorides. Sn3F8 has previously been structurally characterized [2], and we now report the structure of Sn7F16 (SnF4.6SnF2). The compound can be prepared by crystallisation from an aqueous hydrofluoric acid solution containing [SnF6]2- and Sn2+. In the structure the [SnF6] unit has a slightly distorted octahedral arrangement, consistent with interactions involving the surrounding Sn (II) atoms, through fluorine bridging. These units lie between infinite layers with an overall composition [Sn6F102+], in which tin atom has either two or three nearest fluorine neighbors, with further contacts completing much distorted coordination arrangements.
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