INDEX tetrafluoride

Fig. 16. Change of refractive index as a function of silicon tetrafluoride in the gas phase14). Qsix4 = 10 sccm. (Reproduced by permission of The Electrochemical Society)...

The Fluorination of Platinum Dioxide.—Platinum dioxide, in a nickel boat, was fluorinated at 200° until the product appeared to be homogeneous. It was analysed by pyrohydrolysis to 500° (Found F, 21-4 Ft, 73T. PtOFj requires F, 21-3 Pt, 72-8%). The complex X-ray powder photograph was not indexed. The involatile solid hydrolysed slowly in moist air with water its hydrolysis was similar to that of platinum tetrafluoride. 

Bromine trifluoride under reflux, dissolved the tetrafluoride to give a deep red solution. The red-brown solid which remained after vacuum distillation of the bromine trifluoride was the 2 1 bromine trifluoride-platinum tetrafluoride adduct [Found F, 35-1 Pt, 36-7. Calc, for (BrFj)2PtF4 F, 34-9 Pt, 34-9%]. The diamagnetic solid melted with some decomposition at 136°. Its X-ray powder pattern was complex and no attempt was made to index it. Iodine pentafluoride neither dissolved nor reacted with the tetrafluoride even on prolonged refluxing at 100°. Chlorine trifluoride, passed over the tetrafluoride at 300°, converted it into a yellow solid, m. p. 170°, of which the X-ray powder pattern was identical with that of the chlorine trifluoride-platinum pentafluoride adduct. ... 

Properties of the iodine pentafluoride-platinum pentafluoride adduct. The solid, m. p. 140°, begins to decompose at 180° this is complete at 300° and the residue is platinum tetrafluoride. The adduct is paramagnetic, p = 0-65 B.M. (23°). The X-ray powder pattern was complex and no attempt was made to index it. Water reacted vigorously with it to give a solution containing the hexafluoroplatinate(iv) ion. Reaction with most organic solvents was exothermic and complex, but carbon tetrachloride neither reacted with nor dissolved it. 

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