Relativistic contribution: an electronic explanation to the thermal disproportionation of PtF5

2017-09-15T20:51:05Z (GMT) by Robson de Farias
<div> <p>In the present work, is performed a computational thermochemical study of platinum tetrafluoride (PtF<sub>4</sub>) and platinum pentafluoride (PtF<sub>5</sub>). The results are compared to those previously [1] obtained to PtF<sub>6</sub> as well as experimental data. Is concluded that in gaseous phase PtF<sub>4</sub> and PtF<sub>5</sub> retain their structures and number of unpaired electrons exhibited in the solid phase. Furthermore, is proposed that the generally accepted t<sub>2g</sub><sup>5</sup>e<sub>g</sub><sup>0 </sup>configuration to Pt<sup>5+</sup> is not correct. Based on the calculated results, an energy diagram is proposed to PtF<sub>5</sub>, which explain why, upon heating, platinum pentafluoride disproportionates readily [7]: 2PtF<sub>5</sub> → PtF<sub>4</sub> + PtF<sub>6</sub>, providing a clear, elegant and straightforward explanation to the thermal instability of PtF<sub>5</sub> as consequence of the electronic configuration. </p> </div>