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- W2146605265 abstract "Abstract Previous work in this laboratory and elsewhere has established the relative order of oxidizing ability UF 6 > MoF 6 > WF 6 , both in the gas phase, and in MeCN solution. We have now compared the hexafluorides' redox properties in MeCN with other redox couples using cyclic voltammetry, and by carrying out the appropriate redox reactions under carefully controlled conditions. The order of oxidizing ability established is UF 6 ,UF 6 − > MoF 6 ,MoF 6 − > Tl 3+ ,Tl + > NO + ,NO > Cu 2+ ,Cu + ⩾ WF 6 ,WF 6 − > Ag + ,Ag O > I 2 ,I − > MoF 6 − ,Mo IV > Cu + ,Cu O > Tl + ,Tl O > WF 7 − ,W V > WF 6 − ,W IV . MoF 6 oxidizes Cu O to Cu 2+ , and the latter is reduced by Cu O to Cu + . In both cases the counter- anion is MoF 6 − ; there is no evidence for MoF 6 2− or MoF 7 − . The analogous WF 6 system is described by the redox and F − ion transfer equilibria, Cu 2+ + WF 6 − ⇋ Cu + + WF 6 and WF 6 − + WF 6 lrhar2; WF 7 − + WF 5 , WF 7 − being redox inactive. Tl O is oxidised to Tl 3+ by MoF 6 or UF 6 , providing [MF 6 ] ⩾ ca . 2 mol dm −3 . At lower [MF 6 ], mixtures of Tl + and Tl 3+ with MF 6 − counter-anions are formed, presumably because the process Tl + → Tl 3+ is relatively slow. As expected from previous studies of MoF 6 and WF 6 in the gas phase or in SO 2 solution, WF 6 − is oxidized by NO + , and both hexafluorides oxidize I − . The products from the WF 6 ,I − reaction in MeCN are I 2 WF 7 − , and WF 6 , but with MoF 6 oxidation of I 2 occurs and [I(NCMe) 2 ][Mo V F 6 ] is isolated from solution." @default.
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- W2146605265 date "1983-11-01" @default.
- W2146605265 modified "2023-09-26" @default.
- W2146605265 title "The redox properties of UF6, MoF6 and WF6 in MeCN" @default.
- W2146605265 doi "https://doi.org/10.1016/s0022-1139(00)85526-8" @default.
- W2146605265 hasPublicationYear "1983" @default.
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