Contributions to bis(perfluoroalkyl) chalkogenide chemistry: preparation of (Rf)2SeO [Rf = C2F5, (CF3)2CF, n-C4F9], (Rf′)2TeX2 [X = F, Cl: Rf′ = n-C3F7, (CF3)2CF, n-C4F9; X = Br: Rf′ = n-C3F7, n-C4F9], (CF3)2Te(NSO)2 and (C2F5)2Te(OH)NO3
作者:S. Gockel、A. Haas、V. Probst、Roland Boese、Iris Müller
DOI:10.1016/s0022-1139(99)00292-4
日期:2000.3
The reaction between perfluoroalkyl iodides with a threefold excess of a 1 : 1 molar mixture of Se and Cu is a new method for the preparation of corresponding monoselenides (la-c) and diselenides (2a-d). They are oxidised with HOF without a solvent to bis(perfluoroalkyl) selenium(IV) oxides (3a-d). Halogenation of (R-f)(2)Te with XeF2, Cl-2 or Br-2 yielded (R-f)(2)TeF2(7a-c), (R-f)(2)TeCl2 (8a-c) and (R-f')(2)TeBr2 (9a, 9c). Oxidation of (C2F5)(2)Te with cone. HNO3 gave (C2F5)(2)TeCOH)NO3 (4). When (CF3)(2)TeCl2 is treated with AgNSO metathesis took place forming (CF3)(2)Te(NSO)(2), (6). Two (C6F5)(2)Te(VI) derivatives with the general formula (C6F5)(2)TeX4. with X = CF3C(O)O (5) and F are made from (C6F5)(2)TeO2 and CF3C(O)OH or SP4, respectively. The monotelluride (n-C6F13)(2)Te was synthesised similarly from n-C6F13I, Te and Cu. X-ray structures for 3d, 8a, and 8b are provided. (C) 2000 Elsevier Science S.A. All rights reserved.