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- W1998666212 abstract "Rhenium and uranium hexafluorides oxidise iodine in iodine pentafluoride at ambient temperature to give the I2+ cation. With UF6 additional reaction occurs to give β-uranium pentafluoride as one product (J.A. Berry, A. Prescott, D.W.A. Sharp, and J.M. Winfield, J. Fluorine Chem., 1977, 10, 247). Further work on the latter reaction together with an electronic spectroscopic study of the oxidation of I2 by phosphorus pentafluoride in IF5, suggests that the fate of the I2+ cation depends on the nature and quantity of the oxidising agent. Oxidation of I2 by PF5 can be conveniently followed by monitoring its visible spectrum. The reaction occurs over several hours and eventually an apparent equilibrium between I2 and I2+ results. Formation of I2+UF6−is rapid and, with the mole ratio UF6:I2 > 10:1, UF5 is precipitated rapidly from solution, I2+ being oxidised further, apparently to IF5. With a smaller UF6:I2 mole ratio UF5 is contaminated by I2, the latter is presumed to result from the disproportion-ation of an II or IIII fluoride.β-UF5 is very soluble in acetonitrile and reacts with thallium(I) fluoride in this solvent to give TlIUF6. It reacts with trimethyl(methoxo)silane to give (CH3)3SiF, U(OCH3)5, and an insoluble solid, believed to be a mixture of UV methoxide, fluorides. Both reactions are conveniently followed by near i.r. spectroscopy." @default.
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- W1998666212 date "1980-12-01" @default.
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- W1998666212 title "Uranium (V) fluorides" @default.
- W1998666212 doi "https://doi.org/10.1016/s0022-1139(00)84094-4" @default.
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